Brief observable anxiety sensitivity treatment: intervention development and a pilot randomized-controlled acceptability and feasibility trial to evaluate a brief intervention for anxiety sensitivity social concerns.

Social anxiety disorder is one of the most prevalent anxiety disorders. There is a need to develop brief, virtual, single-session interventions targeting constructs associated with social anxiety, such as anxiety sensitivity social concerns (ASSC). ASSC is the maladaptive belief about consequences arising from observable symptoms of anxious arousal. This study was designed to evaluate the initial acceptability and feasibility of a brief ASSC reduction program (Brief Observable Anxiety Sensitivity Treatment [BOAST]) which included a single clinician-led intervention session followed by a two-week ecological momentary intervention (EMI), delivered via mobile app. Participants (N = 36) were adults with elevated ASSC who were randomly assigned to receive BOAST (n = 19) or a waitlist control (n = 17). The trial was prospectively registered at clinicaltrials.gov (NCT04859790). Results supported the acceptability of BOAST with mixed findings for feasibility. Feasibility metrics for the EMI component were below pre-defined thresholds; however, there was evidence that homework completion was associated with symptom reduction. Preliminary efficacy metrics indicated that participants in the BOAST condition had large reductions in ASSC and one measure of social anxiety at 1-month follow-up. This study provides preliminary support for the acceptability of BOAST and elucidates avenues for future clinical and research efforts.

Exploring trajectories in transdiagnostic behavior therapy.

Transdiagnostic treatments have been designed to target common processes for clusters of disorders. One such treatment, transdiagnostic behavior therapy (TBT), targets avoidance across emotional disorders, including posttraumatic stress disorder (PTSD), depressive disorders, and anxiety disorders, and has demonstrated efficacy in randomized controlled trials. The current study was designed to examine whether distinct treatment trajectories would emerge in a sample of 112 veterans receiving TBT and whether diagnostic comorbidity, baseline levels of several transdiagnostic risk factors, or treatment engagement influence trajectory membership. Growth mixture modeling revealed three distinct trajectories across depression, ds = 0.55-1.09; PTSD ds = -0.07-1.43; and panic disorder symptoms, ds = -0.13-1.09. Notably, for PTSD and panic disorder symptoms, separate classes for responders and nonresponders emerged among participants with high baseline symptom levels. Findings for the risk factors suggested that PTSD and panic nonresponders evidenced significantly higher behavioral avoidance at baseline and reduced engagement in treatment procedures and homework completion compared to responders. Together, the findings provide additional support for the use of TBT in the treatment of emotional disorders, including PTSD. Potential adaptations are discussed for patients with significantly elevated behavioral avoidance to improve treatment engagement and related outcomes.

Anxiety Sensitivity and Intolerance of Uncertainty: Transdiagnostic Risk Factors for Anxiety as Targets to Reduce Risk of Suicide.

PURPOSE OF REVIEW: Suicide has a profound impact on individuals, families, and society. One prominent, if understudied, risk factor for suicide is anxiety. More than 70% of people with at least one suicide attempt meet diagnostic criteria for an anxiety disorder. There are several limitations to exploring the associations between anxiety and suicide using diagnosis-based classification systems. A better approach would be to consider transdiagnostic risk factors for anxiety. RECENT FINDINGS: Through a negative reinforcement model of suicide, anxiety sensitivity (AS) and intolerance of uncertainty (IU) appear to exacerbate the experience of unpleasant anxiety sensations and likely contribute to chronic suicide risk as well as acute suicidal acts. Although more research is needed to clarify the mechanisms through which AS and IU confer risk, brief interventions may offer an ideal suicide prevention strategy for anxious people.

Reinforcement-based responsiveness, depression, and anhedonia: A multi-method investigation of intergenerational risk.

Offspring of depressed parents are at an increased risk for depression. Reward- and punishment-based systems might be mechanisms linking maternal outcomes to offspring depression and anhedonia. The current study was designed to investigate the intergenerational relations between maternal markers of reward and punishment responsiveness and their offspring's depression and anhedonia in a community sample of 40 mother (mean age = 44.5; SD = 6.82) and adolescent (mean age = 14.73; SD = 1.25; 52.5% female) dyads. Maternal markers of reward and punishment responsiveness were captured using self-report, behavioral, and neurophysiological methods, and self-reported depression and anhedonia symptoms were used as outcomes among the adolescent offspring. Maternal self-reported reward responsiveness and punishment learning rates were differentially associated with depression across male and female offspring. Regarding anhedonia, maternal punishment learning rate was positively related to adolescent anhedonia regardless of offspring biological sex. Maternal reward learning rate was also positively associated with anhedonia among male offspring. In general, low concurrence across self-report, behavioral, and neurophysiological markers of reward and punishment responsiveness was found. The results from the current study suggest that learning-rates on reinforcement-based behavioral tasks may be important objective markers to consider when evaluating intergenerational risk.

Risk factors of suicidal behaviors in a high-risk longitudinal veteran sample: A network analysis.

INTRODUCTION: Suicide is a substantial public health burden, particularly among veterans. Risk factors have been delineated for suicide; however, the dynamic interrelations between risk factors have not been fully examined. Such research has the potential to elucidate processes that contribute to suicide risk between individuals with a past suicide attempt (attempters) and those without a past suicide attempt (nonattempters). METHODS: In the current study, network analysis was used to compare networks between attempters and nonattempters in a high-risk veteran sample (N = 770; Mage  = 32.3 years, SD = 6.8; 326 with a past suicide attempt) who were followed over 1 year. Networks were estimated to examine (1) concurrent relations of suicide risk factors at baseline and (2) predictability of prospective suicidal behavior (SB). RESULTS: There were no differences in the overall connectivity of attempter and nonattempter networks. Perceived burdensomeness and posttraumatic stress disorder (PTSD) symptoms were most central in the attempters' network, whereas PTSD symptoms and insomnia were most central in the nonattempters' network. The risk factors prospective SB in either network. However, attempters were more likely to engage in SB over the course of the study. CONCLUSION: These findings highlight the difficulty in predicting who will attempt suicide.

Association of insomnia phenotypes based on polysomnography-measured sleep duration with suicidal ideation and attempts.

OBJECTIVE: To assess the association of insomnia phenotypes, being insomnia with short sleep duration (ISSD) and insomnia with normal sleep duration (INSD), with suicidality in a randomly selected population-based sample. METHODS: Data were analyzed from the Penn State Adult Cohort. Participants (N = 1741, 52.5 years, 57.4% female) were randomly recruited from the general population between January 1990 through March 1999 and mortality data were available through December 2018. Insomnia symptoms were defined as self-reports of moderate-to-severe difficulties initiating or maintaining sleep, early morning awakening and non-restorative sleep, or having chronic insomnia (n = 719). Short sleep duration was defined as <6 hours of in-lab polysomnography-measured sleep duration (n = 879). Suicidality (SAI; n = 102) was ascertained by a lifetime history of suicidal ideation (SI; n = 84), suicide attempts (SA; n = 48) or death by suicide (DBS; n = 10). RESULTS: Compared to normal sleepers who slept ≥6 hours, participants with ISSD and INSD were associated with 1.72-fold and 2.22-fold increased odds of SAI, respectively; these associations were significant for SI, with 2.09-fold and 2.24-fold increased odds, respectively, but not for SA, after adjusting for physical and mental health comorbidities. ISSD and INSD differed in SAI age of onset and hospitalizations after SA. CONCLUSIONS: The results of this cohort study suggest that both INSD and ISSD phenotypes are associated with increased suicidal ideation, while the INSD phenotype has an earlier age of onset and is more likely to experience hospitalizations after attempting suicide. These results highlight the importance of targeting insomnia symptoms to help prevent suicide.

Cognitive risk factors and the experience of acute anxiety following social stressors: An ecological momentary assessment study.

To better understand how social anxiety develops, it is crucial to identify mechanisms that influence anxiety following social stressors. Anxiety sensitivity social concerns (ASSC; fear of publicly observable anxiety symptoms) and fear of negative evaluation (FNE; distress arising from concerns about negative judgment) are constructs that amplify anxiety following social stressors. However, it is unclear how ASSC and FNE influence acute anxiety following stressors in naturalistic settings. In the current study, the impact of ASSC and FNE on anxious arousal and anxious apprehension following stressors was examined in community adults (N = 83; M age = 29.66 years, SD = 12.49, 59.0% female) who completed questionnaires five times per day for two-weeks. Dynamic structural equation modeling was used to examine predictors of overall levels of anxiety as well as anxiety following social and nonsocial stressors. ASSC interacted with the presence of social stressors, such that ASSC positively predicted anxious arousal following social stressors. FNE interacted with the presence of nonsocial stressors to predict both forms of anxiety, such that FNE positively predicted anxiety following nonsocial stressors. These findings suggest ASSC may specifically amplify anxious arousal following social stressors, whereas FNE may broadly amplify anxiety following nonsocial stressors.

Anxiety sensitivity and intolerance of uncertainty are unique and interactive risk factors for COVID-19 safety behaviors and worries.

Intolerance of uncertainty (IU) and anxiety sensitivity (AS) predict distress during the COVID-19 pandemic. However, little is known about how AS and IU jointly predict COVID-19 worries and behaviors. Structural equation modeling was used to examine the direct and interactive effects of AS and IU as related to COVID-19 worries and behaviors in two samples of community adults recruited in April 2020 (N = 642; M age = 38.50 years, SD = 10.00) and May 2020 (N = 435; M age = 34.92 years, SD = 14.98). In sample 1, there was a significant AS by IU interaction predicting COVID-19-related catastrophizing worries, stockpiling, and cleaning behaviors such that the relationship of AS to COVID-19-related behaviors was stronger at high levels of IU. However, although AS predicted some COVID-19 related worries and behaviors, AS and IU did not interact in sample 2. Across samples, AS was directly related to financial and health worries, whereas IU was not a significant predictor after controlling for AS. These findings suggest AS consistently impacts COVID-19 worries and behaviors, particularly among individuals with high IU. Brief interventions targeting AS and IU may help people cope during the COVID-19 pandemic and reintegrate following the pandemic.

Pain intensity trajectories among veterans seeking mental health treatment: Association with mental health symptoms and suicidal thoughts and behaviors.

BACKGROUND: The purpose of this study was to identify classes of pain intensity trajectories among veterans reporting suicidal ideation with no prior mental health treatment experience. We were interested in also assessing factors associated with the pain trajectory classes. METHODS: A total 747 participants completed measures of pain, depression, suicide ideation and behaviors, insomnia, substance use, and PTSD. Follow-up assessments were completed at 1-, 3-, 6-, and 12-months post-baseline. Growth mixture modeling was conducted, and pain trajectories were modeled from baseline to month 12. RESULTS: Three classes were identified: mild pain intensity that increased over time to severe pain intensity (Increasing-Severe; n = 9), low pain intensity that decreased over time (Mild-Decreasing; n = 172), and moderate pain intensity that remained relatively stable over time (Moderate-Stable; n = 566). The Moderate-Stable trajectory had more severe PTSD symptoms, more frequent depression symptoms, and more severe insomnia. The odds of endorsing suicide ideation at month 12 were significantly higher in the Moderate-Stable trajectory compared to the Mild-Decreasing trajectory. CONCLUSIONS: This was the first study to assess classes of pain intensity trajectories among individuals who were treatment naïve for mental health issues. The findings suggest that a moderate stable trajectory of pain intensity over the course of 12 months is common and associated with a more severe clinical profile, including suicide ideation. This study underscores the importance of addressing pain intensity among individuals seeking mental health treatment, particularly for those with pain intensity that is moderate and stable over time.

Changes in unhealthy exercise in outpatient eating disorder treatment: examining emotion avoidance mechanisms.

Unhealthy exercise (UE) is a common symptom of eating disorders (EDs) associated with elevated chronicity and relapse. Previous research suggests that UE serves an emotion regulation function, especially to reduce negative affect. UE may be especially prevalent among individuals with anorexia nervosa (AN), as UE and restrictive eating may be used to avoid unpleasant emotions. It is unclear whether changes in emotion avoidance (EA) can lead to changes in UE over time. The current study examined whether month 1 EA mediated the relation between baseline UE and month 2 UE in a clinical sample of 127 patients (Mage = 22.52 [SD = 11.75], 92.9% female) recruited from an ED outpatient treatment program. The current study also explored whether this mediation was stronger for individuals with AN than other ED diagnoses. Findings revealed that changes in EA significantly mediated the relation between changes in UE from baseline to month 2 of treatment. ED diagnosis did not moderate this relation. Findings suggest that improvements in EA may reduce UE over time. Treatment should target UE through cultivation of increased emotion acceptance.Level of evidence Level III: evidence obtained from well-designed cohort study.

COVID-19 Impact Battery: Development and Validation.

In addition to impacting the physical health of millions of Americans, the novel-coronavirus (COVID-19) pandemic is a significant psychological stressor due to both the threat of the illness itself and the mitigation strategies used to contain the spread. To facilitate understanding of the impact of COVID-19, validated measures are needed. Using a stepwise procedure in line with best-practice measurement procedures, the current report summarizes the procedures employed to create the COVID-19 Impact Battery (CIB). Two independent samples recruited via Amazon Mechanical Turk (N = 175, N = 642) and a third community sample (N = 259) were used for reliability and validity testing. Validation procedures yielded a battery consisting of three scales assessing COVID-19 related behaviors, worry, and disability. The behaviors scale contains three subscales assessing stockpiling, cleaning, and avoidance. The worry subscale also contains three subscales assessing health, financial and catastrophic concerns. In addition, we created a short version of the battery (CIB-S) to allow for more flexibility in data collection. In summary, we have provided reliability and validity information for the CIB and CIB-S, demonstrating that these measures can facilitate evaluation of the broad impact of COVID-19 on mental health functioning.

Attentional Control Moderates the Relations between Intolerance of Uncertainty and Generalized Anxiety Disorder and Symptoms.

BACKGROUND: Intolerance of uncertainty (IU), perceived attentional control (AC), and poor cognitive control abilities are risk factors for anxiety; however, few studies have examined their interactive effects in relation to anxiety. A more complete understanding of interplay between IU, perceived AC, and cognitive control could inform intervention efforts. METHODS: The current study examined the direct and interactive effects of IU and AC on anxiety in a sample of 280 community outpatients (M age = 36.01 years, SD = 16.17). Perceived AC was measured using self-report and cognitive control abilities were measured using a Go/No-Go task. RESULTS: Findings indicated a significant IU by perceived AC interaction predicting worry and GAD diagnoses. There was a positive relation between IU and worry/GAD diagnoses that was strongest among those with high perceived AC. Perceived AC was unrelated to cognitive control abilities, and cognitive control abilities did not interact significantly with IU. Cognitive control abilities were related to worry symptoms but not to GAD diagnoses. CONCLUSIONS: These results indicate that at high levels of perceived AC, individuals with elevated IU report higher levels of worry, potentially due to the conscious use of worry as an emotion regulation strategy. Clinical implications and future directions are discussed.

Lonely, anxious, and uncertain: Critical risk factors for suicidal desire during the COVID-19 pandemic.

Public health measures enacted early in response to the COVID-19 pandemic resulted in unprecedented physical isolation. Social isolation, or the objective experience of being alone, and loneliness, the subjective feeling of being lonely, are both implicated in suicidal ideation. Anxiety sensitivity (i.e., fear of somatic anxiety) and intolerance of uncertainty (distress due to uncertainty), may also be heightened in response to the pandemic increasing risk for suicidal ideation in response to social isolation and loneliness. The direct and interactive relations loneliness, anxiety sensitivity, and intolerance of uncertainty shared with suicidal ideation were examined using structural equation modeling across two samples. Sample 1 comprised 635 people (M age = 38.52, SD = 10.00; 49.0% female) recruited using Mechanical Turk in May 2020. Sample 2 comprised 435 people (M age = 34.92, SD = 14.98; 76.2% female) recruited from faculty, staff, and students at a midwestern university in June 2020. Loneliness and anxiety sensitivity were positively, uniquely associated with suicidal ideation across samples. Results of this study were cross-sectional and included only self-report measures. These findings highlight loneliness and anxiety sensitivity as important correlates of suicidal ideation. Modular treatments should be employed to target these mechanisms to reduce COVID-19-related suicidal ideation.

Are we still uncertain about the latent structure of intolerance of uncertainty: Results from factor mixture modeling in a Serbian sample.

BACKGROUND: Intolerance of uncertainty (IU) is a transdiagnostic risk factor for emotional disorders. Exploring the nature of IU might allow us to understand better a difference between pathological and normal worry processes. For that purpose, factor mixture modeling (FMM) can be used to test the latent structure of IU across a categorical-dimensional spectrum. METHOD: In the current study, FMM was used to examine the structure of IU in a sample of 1440 (Mage = 19.71, SD = 1.14) university students in Serbia. A Serbian Intolerance of Uncertainty Scale-11 was used. RESULTS: Results suggest that IU has four latent classes, named as Low IU, Moderate-Low IU, Moderate-High IU and High IU. The Low IU and High IU classes significantly differed in levels of positive and negative affect (NA), symptoms of depression (D), anxiety (A), stress (A), depressive cognitive bias and anxiety sensitivity (AS). Moderate-Low IU and Moderate-High classes had higher symptoms than Low IU class, but lower than High IU class. The Moderate-Low IU and Moderate-High IU classes differed in symptoms of D, A, S, and in levels of AS and NA. LIMITATIONS: This study was cross-sectional and included only non-clinical sample. CONCLUSION: The latent structure of IU tested on a Serbian sample can be described in terms of hybrid latent structure The cut-off scores of ≤ 19 and ≥ 26 can be used to detect those who are non-vulnerable or at risk for IU-related psychopathology.

Actual versus perceived infection rates of COVID-19: Impact on distress, behavior and disability.

OBJECTIVE: Accurate threat appraisal is central to survival. In the case of the coronavirus pandemic, accurate threat appraisal is difficult due to incomplete medical knowledge as well as complex social factors (e.g., mixed public health messages). The purpose of this study was to evaluate the degree to which individuals accurately perceive COVID-19 infection rates and to explore the role of COVID-19 threat perception on emotional and behavioral responses both cross sectionally and prospectively. METHODS: A community sample (N = 249) was assessed using online crowdsourcing and followed for one month. COVID-19 threat appraisal was compared with actual COVID-19 infection rates and deaths at the time of data collection in each participant's county and state. It was predicted that actual versus perceived COVID-19 infection rates would only be modestly associated. Relative to actual infection rates, perceived infection rates were hypothesized to be a better predictor of COVID-related behaviors, distress, and impairment. RESULTS: Findings indicated that relative to actual infection, perceived infection was a better predictor of COVID-related outcomes cross sectionally and longitudinally. Interestingly, actual infection rates were negatively related to behaviors cross sectionally (e.g., less stockpiling). Prospectively, these variables interacted to predict avoidance behaviors over time such that the relationship between perceived infection and avoidance was stronger as actual infection increased. CONCLUSIONS: These data suggest that perceived COVID-19 infection is significantly associated with COVID-related behaviors, distress and impairment whereas actual infection rates have a less important and perhaps even paradoxical influence on behavioral responses to the pandemic.

Anxiety Sensitivity and Arousal Symptom Implicit Association Task Performance: An Event-Related Potential Study of Cognitive Processing of Anxiety-Relevant Stimuli.

BACKGROUND: Anxiety sensitivity (AS), or the fear of anxious arousal, is a transdiagnostic risk factor. Despite the proliferation of self-report research showing AS is related to anxiety, cognitive processes underlying AS are poorly understood. Specifically, AS may reflect processes related to early attentional orientation and response monitoring (reflecting automatic processes), or later engagement and assigning emotional salience towards stimuli (reflecting conscious processes). METHODS: To elucidate cognitive processes underlying AS, event-related potential (ERP) components were elicited in the current study during a novel implicit association task (IAT) in which participants paired self (versus other) words with anxious arousal (versus calm) words. Analyses were then conducted in a sample of community adults (N = 67; M age 39.43, SD = 15.33, 61.2% female) to investigate the association between AS and ERP markers indicative of cognitive processing derived during the IAT. RESULTS: AS was not related to performance on the arousal-IAT and that ERP components did not differ by IAT condition. AS predicted overall late positive potential (LPP) amplitude, particularly in the me/anxiety condition. Elevated IAT scores (reflecting greater ease pairing self-words with anxiety-words) predicted greater P300 amplitude in the me/anxiety condition. LIMITATIONS: The sample was relatively small, and bottom-up processes were not assessed. CONCLUSIONS: These findings are inconsistent with the claim that AS is related to top-down cognitive processes driving self-arousal automatic associations. Instead, AS may relate to cognitive processes regulating emotional engagement with stimuli. Further investigations of cognitive processes underlying AS are needed to inform novel interventions targeting AS.

Profiles of Risk for Suicidal Behavior in Past and Current United States Military Personnel: Latent Profile Analysis of Current Risk Factors.

Person-centered approaches are underutilized to identify people with shared risk profiles. In this study, an at-risk sample of 773 past/current military personnel (Mage = 31.3 years, SD = 6.8) with current ideation (90.6%) and/or a prior suicide attempt (43.9%) were assessed using latent profile analysis. Variables included prior suicide attempts, suicidal ideation, alcohol/drug use, insomnia, depression, belongingness, burdensomeness, and post-traumatic stress disorder symptoms. Three classes emerged: Low Symptoms (N = 502), Elevated Suicidality (N = 176), and Elevated Substance Use (N = 95). At 1-month follow-up, the Elevated Suicidality and Elevated Substance Use classes had the highest odds of suicidal behavior. The finding concerning the Elevated Substance Use class suggests it may represent a distinct short-term risk group in military personnel.

Niacin biological challenge: A paradigm to evaluate social concerns.

BACKGROUND AND OBJECTIVES: Anxiety sensitivity (AS) social concerns, the fear of observable anxiety symptoms is posited as a risk factor for social anxiety by increasing fear reactivity in social situations when observable anxiety symptoms are present. Experimental evaluation of AS social concerns is limited. The current study utilized several manipulations designed to be relevant to AS social concerns or fear of negative evaluation (FNE), a distinct social anxiety risk factor. The effects of these manipulations on fear reactivity to a speech were examined. METHODS: Participants (N = 124 students; M age = 19.44, SD = 2.45; 64.5% female) were randomized to one of four conditions in a 2 (100 mg niacin vs 100 mg sugar pill) X 2 (instructional set) design. For the instructional set manipulation, participants were told their speech performance would be evaluated by a judge based on their performance (i.e., FNE-relevant) or their observable anxiety symptoms (i.e., AS social concerns-relevant). RESULTS: There was a main effect for vitamin condition with participants in the niacin condition reporting higher panic symptoms post-speech relative to those in the placebo condition. There was no main effect for speech instructions. As hypothesized, these effects were qualified by an interaction indicating that AS social concerns significantly predicted panic symptoms for those receiving niacin. LIMITATIONS: Limitations include the reliance on self-reports of outcome variables and the use of an undergraduate student sample. CONCLUSIONS: These findings highlight a distinct role of AS social concerns in fear responding to socially evaluative situations in the context of physically observable arousal.

Depression and Intolerance of Uncertainty: Relations between Uncertainty Subfactors and Depression Dimensions.

Depression is often modeled as a unidimensional construct despite evidence for distinct symptom dimensions (i.e., cognitive, affective, and somatic symptoms). Intolerance of uncertainty (IU; a cognitive bias that increases distress in uncertain situations) is a risk factor implicated in the development of depression. However, it is unclear how IU lower-order dimensions (i.e., inhibitory IU, the fear of future unpredictable events; prospective IU, avoidance due to fear of uncertain events) relate to depressive symptoms. The current study used confirmatory factor analysis and structural equation modeling to examine the relations between depressive symptoms and lower-order dimensions of IU in a sample of 374 adults (M age = 35.5, 54.3% female) with elevated psychopathology (89.2% meeting criteria for at least one DSM-5 diagnosis, 25.6% primary depressive disorder). A two-factor model of depression, composed of Cognitive and Affective/Somatic factors, provided superior model fit compared to one- and three-factor solutions. A bifactor model of IU, composed of a general IU factor and specific Inhibitory IU and Prospective IU factors, provided superior model fit compared to one- and two-factor solutions. The general IU factor related to both Cognitive and Affective/Somatic factors. Inhibitory IU related to the Cognitive factor, but not the Affective/Somatic factor. Prospective IU was not related to Cognitive or Affective/Somatic factors. These findings elucidate the relations between IU and depression symptoms and have important theoretical implications regarding the etiology of depressive symptoms. In particular, inhibitory IU may be a novel target for intervention efforts in individuals presenting with depressive symptoms.

Heterogeneity in Short-Term Suicidal Ideation Trajectories: Predictors of and Projections to Suicidal Behavior.

OBJECTIVE: Little is known about suicidal ideation stability, including whether stability is heterogeneous or homogeneous between individuals. Studies of this kind are necessary to understand the progression from suicidal ideation to action. METHOD: This study examined suicidal ideation trajectories, using growth mixture modeling, in a sample of 359 past/current military service members (M age = 32.1 years, SD = 7.7; 88.3% male). Self-reported suicidal ideation information was collected at baseline and follow-up sessions at months 1, 3, 6, and 12. Following extraction of the best-fitting solution, predictors of trajectory status were examined and trajectory status was used to predict suicidal behavior between baseline and month 12 assessments. RESULTS: Results revealed four trajectories, Low-Stable (n = 125), Moderate-Stable (n = 101), High-Stable (n = 76), and High-Rapidly Declining (n = 57). In general, the High-Stable trajectory had the highest levels of perceived burdensomeness, thwarted belongingness, PTSD symptoms, and drug use. The High- and Moderate-Stable trajectories had the highest rates of suicidal behavior between baseline and month 12. CONCLUSIONS: Suicidal ideation, even in individuals with elevated ideation, is not a homogeneous construct over time. Stability of suicidal ideation might be an important risk factor, even if ideation is only moderately elevated.