Association Between Exposure to Suicidal Behaviors and Suicide Attempts Among Adolescents: The Moderating Role of Prior Psychiatric Disorders.

Theories suggest that adolescents exposed to suicide attempts and/or deaths are at higher risk of attempting suicide, themselves. However, research findings have been mixed, with most studies not accounting for psychiatric vulnerability. We examined past psychiatric diagnosis as a moderator of the association between lifetime exposure to suicide attempts and/or deaths and adolescents' suicide attempts. Adolescents (N = 518; 60% female; 45% White), ages 12-21, reported on prior suicide ideation and attempts, and mood, anxiety, and substance use disorders at baseline. Suicide attempts since baseline and exposure to suicidal behaviors were assessed 4-6 years later. Lifetime exposure to family suicide attempts and/or suicide deaths, but not to suicidal behaviors of peers/friends or others, was associated with a suicide attempt at follow-up among those with prior psychiatric disorders. Psychologically vulnerable adolescents may require additional support after exposure to suicidal behaviors of a family member to reduce their risk of attempting suicide.

Evolution of Vehicle Emission Factors in a Megacity Affected by Extensive Biofuel Use: Results of Tunnel Measurements in São Paulo, Brazil.

Since 2001, four emission measurement campaigns have been conducted in multiple traffic tunnels in the megacity of São Paulo, Brazil, an area with a fleet of more than 7 million vehicles running on fuels with high biofuel contents: gasoline + ethanol for light-duty vehicles (LDVs) and diesel + biodiesel for heavy-duty vehicles (HDVs). Emission factors for LDVs and HDVs were calculated using a carbon balance method, the pollutants considered including nitrogen oxides (NOx), carbon monoxide (CO), and sulfur dioxide, as well as carbon dioxide and ethanol. From 2001 to 2018, fleet-average emission factors for LDVs and HDVs, respectively, were found to decrease by 4.9 and 5.1% per year for CO and by 5.5 and 4.2% per year for NOx. These reductions demonstrate that regulations for vehicle emissions adopted in Brazil in the last 30 years improved air quality in the megacity of São Paulo significantly, albeit with a clear delay. These findings, especially those for CO, indicate that official emission inventories underestimate vehicle emissions. Here, we demonstrated that the adoption of emission factors calculated under real-world conditions can dramatically improve air quality modeling in the region.

Racial and Ethnic Differences in Bullying: Review and Implications for Intervention.

Despite increased research on bullying over the past few decades, researchers still have little understanding of how bullying differentially affects racial and ethnic minority and immigrant youth. To facilitate efforts to better evaluate the impact of bullying among racial and ethnic minority youth and improve interventions, we integrated research from multiple disciplines and conducted a systematic search to review relevant cross-cultural research on the prevalence of bullying, risk and protective factors, and differences in behaviors and outcomes associated with bullying in these populations. Studies measuring differences in bullying prevalence by racial and ethnic groups are inconclusive, and discrepancies in findings may be explained by differences in how bullying is measured and the impact of school and social environments. Racial and ethnic minorities and immigrants are disproportionately affected by contextual-level risk factors associated with bullying (e.g., adverse community, home, and school environments), which may moderate the effects of individual-level predictors of bullying victimization or perpetration (e.g., depressive symptoms, empathy, hostility, etc.) on involvement and outcomes. Minority youth may be more likely to perpetrate bullying, and are at much higher risk for poor health and behavioral outcomes as a result of bias-based bullying. At the same time, racial and ethnic minorities and immigrants may be protected against bullying involvement and its negative consequences as a result of strong ethnic identity, positive cultural and family values, and other resilience factors. Considering these findings, we evaluate existing bullying interventions and prevention programs and propose directions for future research.

Emotion expressivity, suicidal ideation, and explanatory factors: Differences by Asian American subgroups compared with White emerging adults.

OBJECTIVE: The relationship between emotion expressivity and psychological symptoms varies by race/ethnicity, and reduced expression of emotions has been implicated in risk for suicidal ideation. The present study examined differences in the relation between emotion expressivity and suicidal ideation through well-documented correlates of suicide risk (i.e., hopelessness, depressive symptoms) among Asian American subgroups compared with White emerging adults. METHOD: A sample of 829 emerging adults, Ages 18 to 28 years, identifying as Asian American (27% East Asian, 18% South Asian, 11% Southeast Asian) or White (44%) completed measures of emotion expressivity, hopelessness, depressive symptoms, and suicidal ideation. RESULTS: Lower emotion expressivity was statistically associated with higher levels of suicidal ideation, via hopelessness and depressive symptoms, among White, East Asian, and South Asian American emerging adults, but not among Southeast Asian Americans, though this difference in mediation was not statistically significant. CONCLUSION: A focus on Asian Americans as a homogenous group occludes important ethnic differences in the relation between emotion expressivity and vulnerability to suicidal ideation. Ethnic differences in the function of emotion expressivity should be considered in suicide prevention and interventions among Asian American emerging adults. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

Racial/Ethnic Discrimination and Suicidal Ideation in Emerging Adults: The Role of Traumatic Stress and Depressive Symptoms Varies by Gender not Race/Ethnicity.

Drawing from Race-Based Traumatic Stress theory, the present study examined whether traumatic stress and depressive symptoms differentially help explain the relation between racial/ethnic discrimination and suicidal ideation across gender and racial/ethnic groups. A racially/ethnically diverse group of emerging adults (N = 1344; Mage = 19.88, SD = 2.25; 72% female; 46% Hispanic) completed a battery of self-report measures. A cross-sectional design was employed with a series of hierarchical linear regression models and bootstrapping procedures to examine the direct and indirect relation between racial/ethnic discrimination and suicidal ideation through traumatic stress and depressive symptoms across gender and race/ethnicity. The findings suggest an indirect relation through depressive symptoms, but not traumatic stress, and a serial indirect relation through traumatic stress to depressive symptoms in young women and young men, the latter of which was stronger in young women. The indirect relations did not vary by racial/ethnic group. Cumulative experiences of racial/ethnic discrimination may impact suicide-related risk via increases in psychiatric symptomology (i.e., traumatic stress and depressive symptoms), particularly in young women. Racial/ethnic discrimination experiences should be accounted for as a potential source of psychological distress in the assessment, diagnosis, and treatment of suicidal thoughts and behavior, especially among young women endorsing traumatic stress and depressive symptoms. Further research is warranted to better understand the gender difference in the relation between racial/ethnic discrimination and suicide-related risk.

Social connectedness, stressful life events, and self-injurious thoughts and behaviors among young adults.

OBJECTIVES: Preventing self-injurious thoughts and behaviors (SITBs) is particularly challenging on commuter campuses, given lower social cohesion and higher levels of stress than among traditional college populations. The present study examined the relationship between stressful life events (SLEs) and risk for different forms of SITBs, along with the potential buffering role of social connectedness, in a diverse sample of young adults from a commuter college. METHODS: Participants were 1712 (81% female; 61% racial/ethnic minority; 20% sexual minority) undergraduate and graduate students from a public commuter college in New York City. Participants completed an anonymous survey that inquired about lifetime and recent (past 12months) history of suicidal ideation, suicide attempts, and non-suicidal self-injury (NSSI), along with social connectedness and lifetime history of SLEs. RESULTS: Lower levels of social connectedness and exposure to a higher number of SLEs were associated with engaging in SITBs in the past year, particularly both suicide attempts and non-suicidal self-injury. However, social connectedness did not buffer against the impact of SLEs on SITBs. LIMITATIONS: Data are cross-sectional, limiting conclusions about directionality, and females were overrepresented. CONCLUSIONS: Identifying ways to increase social connectedness on diverse commuter campuses may help decrease risk of SITBs. However, it may not buffer against the impact of SLEs on risk of SITBs. Future studies should examine contextual variables (e.g., type and timing of social support) that may play a role in protecting against SITBs, particularly for those with a history of adversity.

Emotion Reactivity, Comfort Expressing Emotions, and Future Suicidal Ideation in Emerging Adults.

OBJECTIVE: Emotion reactivity and difficulties in expressing emotions have been implicated in risk for suicidal behavior. This study examined comfort in expressing emotions (positive vs. negative) and depressive symptoms as mediators of the prospective relation between emotion reactivity and suicidal ideation. DESIGN: Emerging adults (N = 143; 72% female; 28% White) completed measures of emotion reactivity, comfort expressing emotions, and suicidal ideation at baseline and of depressive symptoms and suicidal ideation 12 months later. RESULTS: Emotion reactivity predicted suicidal ideation at follow-up through depressive symptoms. Difficulty expressing love-but not happiness, sadness, and anger-partially mediated the relationship between emotion reactivity and suicidal ideation at follow-up before but not after adjusting for baseline ideation. CONCLUSION: The relation between high emotion reactivity and suicidal ideation may be explained by discomfort in the expression of positive emotions and by depressive symptoms. Promotion of comfort in positive emotion expression may reduce vulnerability to suicidal ideation.

Positive future-oriented fantasies and depressive symptoms: Indirect relationship through brooding.

Although a positive future outlook is generally associated with psychological well-being, indulging in positive fantasies about the future has been found to exacerbate negative mood-related outcomes such as depressive symptoms. We examined rumination as a cognitive mechanism in this relationship, using an objectively coded measure of future-oriented fantasies, among 261 young adults assessed twice. Engaging in a positive fantasy about the future was associated with the brooding subtype of rumination but not with reflection at baseline. There was an indirect relationship between fantasies at baseline and depressive symptoms at six-week follow-up through brooding at average and high levels of fantasy positivity when fantasizing was consistent or increased over time but not when it decreased. Engaging in fantasies was indirectly associated with perceived difficulty anticipating likely positive future outcomes through brooding. These findings extend previous research on positive fantasies by suggesting brooding as a mechanism to explain when they are maladaptive.

Heavy truck restrictions and air quality implications in São Paulo, Brazil.

This study quantified the effects of traffic restrictions on diesel fuel heavy vehicles (HVs) on the air quality of the Bandeirantes corridor using hourly data obtained by continuous monitoring of traffic and air quality at sites located on this avenue. The study addressed the air quality of a city impacted by vehicular emissions and that PM10 and NOX concentrations are mainly due to diesel burning. Data collection was split into two time periods, a period of no traffic constraint on HVs (Nov 2008 and 2009) and a period of constraint (Nov 2010, 2011 and 2012). We found that pollutants on this corridor, mainly PM10 and NOX, decreased significantly during the period from 2008 to 2012 (28 and 43%, 15.8 and 86.9 ppb) as a direct consequence of HV traffic restrictions (a 72% reduction). Rebound effects in the form of increased traffic of light vehicles (LVs) during this time had impacts on the concentration levels, explaining the differences between rates of reduction in HV traffic and pollutants. Reductions in the number of trucks resulted in longer travel times and increased traffic congestion as a consequence of the modal shift towards LVs. We found that a 51% decrease in PM10 (28.8 µg m-3) was due to a reduction in HV traffic (vehicle emissions were estimated to be 71% of total sources, 40.1 µg m-3). This percentage was partially offset by 10% more PM10 emissions related to an increase in LV traffic, while other causes, such as climatic conditions, contributed to a 13% increase in PM10 concentrations. The relationships analyzed in this research served to highlight the need to apply urban transport policies aimed at decreasing pollutant concentrations in São Paulo, especially in heavily congested urban corridors on working days.

The relationship between aerosol particles chemical composition and optical properties to identify the biomass burning contribution to fine particles concentration: a case study for São Paulo city, Brazil.

The air quality in the Metropolitan Area of São Paulo (MASP) is primarily determined by the local pollution source contribution, mainly the vehicular fleet, but there is a concern about the role of remote sources to the fine mode particles (PM2.5) concentration and composition. One of the most important remote sources of atmospheric aerosol is the biomass burning emissions from São Paulo state's inland and from the central and north portions of Brazil. This study presents a synergy of different measurements of atmospheric aerosol chemistry and optical properties in the MASP in order to show how they can be used as a tool to identify particles from local and remote sources. For the clear identification of the local and remote source contribution, aerosol properties measurements at surface level were combined with vertical profiles information. Over 15 days in the austral winter of 2012, particulate matter (PM) was collected using a cascade impactor and a Partisol sampler in São Paulo City. Mass concentrations were determined by gravimetry, black carbon concentrations by reflectance, and trace element concentrations by X-ray fluorescence. Aerosol optical properties were studied using a multifilter rotating shadowband radiometer (MFRSR), a Lidar system and satellite data. Optical properties, concentrations, size distributions, and elemental composition of atmospheric particles were strongly related and varied according to meteorological conditions. During the sampling period, PM mean mass concentrations were 17.4 ± 10.1 and 15.3 ± 6.9 µg/m3 for the fine and coarse fractions, respectively. The mean aerosol optical depths at 415 nm and Ångström exponent (AE) over the whole period were 0.29 ± 0.14 and 1.35 ± 0.11, respectively. Lidar ratios reached values of 75 sr. The analyses of the impacts of an event of biomass burning smoke transport to the São Paulo city revealed significant changing on local aerosol concentrations and optical parameters. The identification of the source contributions, local and remote, to the fine particles in MASP can be more precisely achieved when particle size composition and distribution, vertical profile of aerosols, and air mass trajectories are analyzed in combination.

Suicidal ideation among racial/ethnic minorities: moderating effects of rumination and depressive symptoms.

Among emerging adults and college students, racial and ethnic minorities experience greater risk for suicidal ideation and behavior than their White counterparts. Research has identified numerous cognitive risk factors for suicidal ideation. However, they have not been well studied among racial and ethnic minorities. The present study examined the association between these factors (brooding rumination, reflective rumination, hopelessness, and depressive symptoms) and suicidal ideation among 690 Black, Latino, and biracial college students. Among all groups, hopelessness was positively associated with suicidal ideation. Brooding was negatively associated with suicidal ideation, after adjusting for reflection and hopelessness, although only at low levels of depressive symptoms. Black race/ethnicity and Latino race/ethnicity, compared with biracial race/ethnicity, each separately interacted with reflection to predict lower levels of suicidal ideation at moderate to high levels of reflection. Furthermore, Latino race/ethnicity, compared with biracial race/ethnicity, interacted with both reflection and depressive symptoms, such that reflection was negatively associated with suicidal ideation among Latino individuals reporting depressive symptoms above the 39th percentile. Biracial race/ethnicity, compared with monoracial race/ethnicity, also interacted with reflection and depressive symptoms, with reflection associated with greater amounts of suicidal ideation at depressive symptom levels above the 39th percentile. Our findings suggest reflective rumination differentially affects racial and ethnic groups and should be considered in conjunction with depressive symptoms among Latino and biracial individuals in suicide risk assessment and treatment.

Active and passive problem solving: moderating role in the relation between depressive symptoms and future suicidal ideation varies by suicide attempt history.

OBJECTIVE: Research suggests that being unable to generate solutions to problems in times of distress may contribute to suicidal thoughts and behavior, and that depression is associated with problem-solving deficits. This study examined active and passive problem solving as moderators of the association between depressive symptoms and future suicidal ideation among suicide attempters and nonattempters. METHOD: Young adults (n = 324, 73% female, mean age = 19, standard deviation = 2.22) with (n = 78) and without (n = 246) a suicide attempt history completed a problem-solving task, self-report measures of hopelessness, depression, and suicidal ideation at baseline, and a self-report measure of suicidal ideation at 6-month follow-up. RESULTS: Passive problem solving was higher among suicide attempters but did not moderate the association between depressive symptoms and future suicidal ideation. Among attempters, active problem solving buffered against depressive symptoms in predicting future suicidal ideation. CONCLUSIONS: Suicide prevention should foster active problem solving, especially among suicide attempters.

Temporal distribution of air quality related to meteorology and road traffic in Madrid.

The impact of climatology--air temperature, precipitation and wind speed--and road traffic--volume, vehicle speed and percentage of heavy-duty vehicles (HDVs)--on air quality in Madrid was studied by estimating the effect for each explanatory variable using generalized linear regression models controlling for monthly variations, days of week and parameter levels. Every 1 m/s increase in wind speed produced a decrease in PM10 concentrations by 10.3% (95% CI 12.6-8.6) for all weekdays and by 12.4% (95% CI 14.9-9.8) for working days (up to the cut-off of 2.4 m/s). Increases of PM10 concentrations due to air temperature (7.2% (95% CI 6.2-8.3)) and traffic volume (3.3% (95% CI 2.9-3.8)) were observed at every 10 °C and 1 million vehicle-km increases for all weekdays; oppositely, slight decreases of PM10 concentrations due to percentage of HDVs (3.2% (95% CI 2.7-3.7)) and vehicle speed (0.7% (95% CI 0.6-0.8)) were observed at every 1% and 1 km/h increases. Stronger effects of climatology on air quality than traffic parameters were found.

Characteristics of suicidal ideation that predict the transition to future suicide attempts in adolescents.

BACKGROUND: The present study sought to examine characteristics of suicidal ideation (SI) that predict a future suicide attempt (SA), beyond psychiatric diagnosis and previous SA history. METHODS: Participants were 506 adolescents (307 female) who completed the Columbia Suicide Screen (CSS) and selected modules from the Diagnostic Interview Schedule for Children (C-DISC 2.3) as part of a two-stage high school screening and who were followed up 4-6 years later to assess for a SA since baseline. At baseline, participants who endorsed SI on the CSS responded to four questions regarding currency, frequency, seriousness, and duration of their SI. A subsample of 122 adolescents who endorsed SI at baseline also completed a detailed interview about their most recent SI. RESULTS: Thinking about suicide often (OR = 3.5, 95% CI = 1.7-7.2), seriously (OR = 3.1, 95% CI = 1.4-6.7), and for a long time (OR = 2.3, 95% CI = 1.1-5.2) were associated with a future SA, adjusting for sex, the presence of a mood, anxiety, and substance use diagnosis, and baseline SA history. However, only SI frequency was significantly associated with higher odds of a future SA (OR = 3.6, 95% CI = 1.4-9.1) when also adjusting for currency, seriousness, and duration. Among ideators interviewed further about their most recent SI, ideating 1 hr or more (vs. less than 1 hr) was associated with a future SA (OR = 3.6, 95% CI = 1.0-12.7), adjusting for sex, depressive symptoms, previous SA history, and other baseline SI characteristics, and it was also associated with making a future SA earlier. CONCLUSIONS: Assessments of SI in adolescents should take special care to inquire about frequency of their SI, along with length of their most recent SI.

Longitudinal follow-up study of adolescents who report a suicide attempt: aspects of suicidal behavior that increase risk of a future attempt.

BACKGROUND: Previous studies have noted that a past suicide attempt (SA) predicts a future SA, but few studies have reported whether previous SAs that predict a future attempt differ from those that do not. Knowing which characteristics of previous SAs predict future attempts would assist in evaluating adolescents at risk of attempt repetition. This longitudinal study of an unreferred sample examined which characteristics of adolescent SAs increased risk for repeat attempts. METHODS: Fifty-four adolescents who had attempted suicide were identified through a two-stage screening of 1,729 high school students. Adolescents reported details of their past SA on the Adolescent Suicide Interview and were reassessed 4-6 years later by telephone. RESULTS: Eighteen of the 54 teens (33%) reported that they had made another SA since baseline, and 17 of these reported characteristics of their later attempt. The odds of a further attempt were significantly increased by being alone (OR = 6.1, 95% CI = 1.1-34.8), retrospectively reporting a serious wish to die (OR = 5.2, 95% CI = 1.2-22.7), and planning the attempt for an hour or more (OR = 5.1, 95% CI = 1.1-25.0). The method of attempt remained consistent from baseline to follow-up attempt (κ = .67). CONCLUSIONS: Screening high school students to identify those who are at risk for making future SAs should include questions about number of previous SAs and such indicators of risk as isolation, wish to die, and extent of planning prior to a SA.

Cashew nut roasting: chemical characterization of particulate matter and genotocixity analysis.

BACKGROUND: Particulate matter (PM) is potentially harmful to health and related to genotoxic events, an increase in the number of hospitalizations and mortality from respiratory and cardiovascular diseases. The present study conducted the first characterization of elemental composition and polycyclic aromatic hydrocarbon (PAH) analysis of PM, as well as the biomonitoring of genotoxic activity associated to artisanal cashew nut roasting, an important economic and social activity worldwide. METHODS: The levels of PM2.5 and black carbon were also measured by gravimetric analysis and light reflectance. The elemental composition was determined using X-ray fluorescence spectrometry and PAH analysis was carried out by gas chromatography-mass spectrometry. Genotoxic activity was measured by the Tradescantia pallida micronucleus bioassay (Trad-MCN). Other biomarkers of DNA damage, such as nucleoplasmic bridges and nuclear fragments, were also quantified. RESULTS: The mean amount of PM2.5 accumulated in the filters (January 2124.2 µg/m(3); May 1022.2 µg/m(3); September 1291.9 µg/m(3)), black carbon (January 363.6 µg/m(3); May 70 µg/m(3); September 69.4 µg/m(3)) and concentrations of Al, Si, P, S, Cl, K, Ca, Ti, Cr, Mn, Fe, Ni, Cu, Zn, Se, Br and Pb were significantly higher than the non-exposed area. Biomass burning tracers K, Cl, and S were the major inorganic compounds found. Benzo[k]fluoranthene, indene[1,2,3-c,d]pyrene, benzo[ghi]perylene, phenanthrene and benzo[b]fluoranthene were the most abundant PAHs. Mean benzo[a]pyrene-equivalent carcinogenic power values showed a significant cancer risk. The Trad-MCN bioassay revealed an increase in micronucleus frequency, 2-7 times higher than the negative control and significantly higher in all the months analyzed, possibly related to the mutagenic PAHs found. CONCLUSIONS: This study demonstrated that artisanal cashew nut roasting is a serious occupational problem, with harmful effects on workers׳ health. Those involved in this activity are exposed to higher PM2.5 concentrations and to 12 PAHs considered potentially mutagenic and/or carcinogenic. The Trad-MCN with T. pallida was sensitive and efficient in evaluating the genotoxicity of the components and other nuclear alterations may be used as effective biomarkers of DNA damage.

Analysis of atmospheric aerosol (PM2.5) in Recife city, Brazil.

Several studies indicate that mortality and morbidity can be well correlated to atmospheric aerosol concentrations with aerodynamic diameter less than 2.5 microm (PM2.5). In this work the PM2.5 at Recife city was analyzed as part of a main research project (INAIRA) to evaluate the air pollution impact on human health in six Brazilian metropolitan areas. The average concentration, for 309 samples (24-hr), from June 2007 to July 2008, was 7.3 microg/m3, with an average of 1.1 microg/m3 of black carbon. The elemental concentrations of samples were obtained by x-ray fluorescence. The concentrations were then used for characterizing the aerosol, and also were employed for receptor modelling to identify the major local sources of PM2.5. Positive matrix factorization analysis indicated six main factors, with four being associated to soil dust, vehicles and sea spray, metallurgical activities, and biomass burning, while for a chlorine factor, and others related to S, Ca, Br, and Na, we could make no specific source association. Principal component analysis also indicated six dominant factors, with some specific characteristics. Four factors were associated to soil dust, vehicles, biomass burning, and sea spray, while for the two others, a chlorine- and copper-related factor and a nickel-related factor, it was not possible to do a specific source association. The association of the factors to the likely sources was possible thanks to meteorological analysis and sources information. Each model, although giving similar results, showed factors' peculiarities, especially for source apportionment. The observed PM2.5 concentration levels were acceptable, notwithstanding the high urbanization of the metropolitan area, probably due to favorable conditions for air pollution dispersion. More than a valuable historical register these results should be very important for the next analysis, which will correlate health data, PM2.5 levels, and sources contributions in the context of the six studied Brazilian metropolises.

When Night Falls Fast: Sleep and Suicidal Behavior Among Adolescents and Young Adults.

Sleep disturbances have been linked to suicidal ideation and behaviors in adolescents. Specifically, insomnia and nightmares are associated with current suicide risk and predict future ideation. Associations between hypersomnia, sleep apnea, and suicide remain inconclusive. Potential biological mechanisms underlying these relationships include executive functioning deficits and hyperarousal. Related psychological factors may include thwarted belongingness, perceived burdensomeness, and negative appraisals. Assessing suicide risk in patients with sleep disturbances, and vice versa, is needed. Therapeutic interventions such as cognitive behavior therapy for insomnia and imagery rehearsal treatment, as well as pharmacologic treatments, show promise in treating sleep disorders and suicidal behavior.

Perceived discrimination, ruminative subtypes, and risk for depressive symptoms in emerging adulthood.

Perceived discrimination has been found to increase risk for depression in emerging adulthood, but explanatory cognitive mechanisms have not been well studied. We examined whether the brooding and reflective subtypes of rumination would mediate the relation between perceived discrimination and depressive symptoms among racial/ethnic minority, versus White, emerging adults, and whether a strong ethnic identity would buffer against this effect. Emerging adults (N = 709; 70% female; 68% racial/ethnic minority), ages 18-25, completed measures of perceived discrimination, rumination, depressive symptoms, and ethnic identity. Perceived discrimination was positively associated with depressive symptoms among racial/ethnic minority and White participants. Brooding--but not reflection--mediated this relation only among racial/ethnic minorities. Ethnic identity, though negatively associated with depressive symptoms, did not buffer against the mediating effect of brooding on the discrimination-depression relation. Interventions for depression among racial/ethnic minority emerging adults should address maladaptive cognitive responses, such as brooding, associated with perceived discrimination.

Prospective Relation between Ruminative Subtypes and Suicide Ideation: Moderating Role of Problem Solving.

Background: Although reflection has been characterized as a more adaptive subtype of rumination than brooding, evidence suggests that reflection is associated with suicide ideation. The present longitudinal study investigated the mediating role of hopelessness and depressive symptoms and the moderating role of problem solving in explaining why reflection may lead to suicide ideation. Methods: Two hundred ninety-four undergraduates participated in the study and were followed up every 6 months over 18 months. Participants completed measures of brooding and reflection, hopelessness, depressive symptoms, problem solving, and suicide ideation. Results: Results revealed that after adjusting for baseline suicide ideation, the serial mediation path from brooding (but not reflection) to suicide ideation via hopelessness and depressive symptoms was significant. Baseline reflection predicted suicide ideation 18 months later through depressive symptoms at 12 months for people average in passive problem solving, and for those low or average in active problem solving. Brooding predicted suicide ideation through depressive symptoms, regardless of problem-solving. Conclusions: Reflection may result in suicide ideation via depressive symptoms among people with poor problem-solving skills. Clinical and theoretical implications are discussed.