Relationship between screen time and sleep among Finnish preschool children: results from the DAGIS study.

STUDY OBJECTIVES: To examine the associations between screen time, the time spent on different screen devices, and sleep in a sample of Finnish preschool children. METHODS: The current study analyzed cross-sectional data from the DAGIS study carried out in Finland in 2015-2016 on 736 children aged 3-6 years. Parents reported in a 7-day diary the durations the child used screen devices daily, with separate details about watching TV or DVDs, using tablets or smartphones, and using computers. In addition, parents reported children's bedtimes and wake-up times, which were further used in calculating sleep duration. Parents answered questions regarding their child's sleep consistency. Statistical analyses included adjusted general linear modeling. RESULTS: An hourly increase in total screen time was associated with 11 min later bedtime (p < 0.001) and 10 min shorter sleep duration (p < 0.001). More TV/DVD watching was associated with later bedtimes (p = 0.016) and a shorter sleep duration (p = 0.001). More smartphone/tablet use was associated with later bedtimes (p = 0.005), later wake-up times (p = 0.038), and weaker sleep consistency (p = 0.024). More computer use was associated with later bedtimes (p = 0.046). Results did not differ between genders. CONCLUSIONS: Increased screen time was associated with later bedtimes and shorter sleep duration among preschool children. Adverse associations with sleep outcomes were found for each screen device. Attention should be paid to promoting balanced use of screens and regular sleep habits in young children.

Individual-, home- and preschool-level correlates of preschool children's sedentary time.

BACKGROUND: Prechoolers' significant portions of sedentary time (ST) is a public-health concern due to its high prevalence and negative health consequences. However, few studies have explored correlates of preschoolers' ST covering individual-, home- and preschool- factors within one study. The aim of this study was to identify the associations between multiple individual-, home- and preschool-level factors and preschoolers' ST. In addition, it was studied how much individual-, home- and preschool-level factors explained the variance in children's ST. METHODS: A total of 864 children aged three to six, their parents and 66 preschools participated in the cross-sectional DAGIS study, which occurred between 2015 and 2016. The children wore an accelerometer for 1 week. Guardians, principals and early educators completed questionnaires covering the potential correlates of children's ST, for example, temperament, practices, self-efficacy and regulations. Multilevel regression analyses were conducted in multiple steps; calculation of marginal and conditional R2 values occurred in the final phase. RESULTS: Of the 29 studied correlates, the following factors remained significant in the final models. Being a boy (p < 0.001) and having high levels of surgency temperament (p < 0.001) were associated with lower ST. Regarding the home setting, frequent co-visits in physical activity (PA) places (p = 0.014) were associated with lower ST. Higher parental perceived barriers related to children's outside PA (p = 0.032) was associated with higher ST. None of the preschool setting factors remained significant in the final model. Approximately 11% of the variance in children's ST was attributed to factors related to the individual level whereas 5% was attributed to home-level factors; and 2% to preschool-level factors. CONCLUSIONS: This study identified a set of correlates of preschool children's ST. Interventions aimed at reducing children's ST should develop strategies targeting established correlates of preschoolers' ST covering individual-, home- and preschool-level factors. The preschool-level factors included in this study explained little the variance in children's ST. However, the included measures may not have captured the essential preschool-level factors that specifically influence children's ST. Therefore, more studies are needed regarding potential preschool-level factors.

Preschool group practices and preschool children's sedentary time: a cross-sectional study in Finland.

OBJECTIVES: Preschool is an important setting for regulating sedentary time (ST). The preschool day in Finland follows daily structures by having morning and afternoon slots for group-based activities that can encourage children for movement (eg, free play and outdoor time) or be still (eg, teacher-led sessions and sitting-based circles). This study aims to explore if the weekly routines in preschool and if more frequent visits in places encouraging physical activity (PA) are associated with children's ST during preschool hours. DESIGN: Cross-sectional DAGIS (Increased Health and Wellbeing in Preschools) study in the years 2015 and 2016. SETTING: In Finland. PARTICIPANTS: 864 children (48% girls, 4.7 years) from 159 preschool groups in 66 preschools OUTCOME MEASURES: A total of 778 children wore required lengths of time (at least 240 min per preschool day, at least 2 days) the accelerometer during preschool hours. Each preschool group reported their weekly schedule during the week, and one early educator completed a questionnaire covering practices. The following five measures related to weekly structures were formed; times of outdoors (times per day), teacher-led sessions (times per day), free play (low, middle or high), organised PA lessons (no lessons at all/others) and mixed activities (no lessons at all/others), and the following five measures about the frequencies of visits in places encouraging PA; nature trips (times per week), play parks (times per week), neighbourhood sport facilities (no visits at all/others), visits to gym or other indoor facility (no visits at all/others) and field trips to neighbourhoods (times per week). Multilevel linear regression analyses were conducted to measure the associations. RESULTS: Of all the tested associations, only more frequently conducted nature trips were associated with lower children's ST during preschool hours (ß=-1.026; 95% CI -1.804 to -0.248). CONCLUSION: Frequent nature trips in preschools may be important due to its association with lower preschool children's ST.

Early educators' practices and opinions in relation to pre-schoolers' dietary intake at pre-school: case Finland.

OBJECTIVE: We aimed to examine associations between early educators' feeding practices and opinions and children's dietary intake at pre-school, in a context where uniform meals are served and pre-schools are highly regulated. DESIGN: Cross-sectional study. Food consumption data of the children consisted of two-day food records from pre-school kept by early educators. Early educators also reported their feeding practices and opinions on pre-school food. Serving style was observed. SETTING: Municipal pre-schools in Southern and Western Finland.ParticipantsPre-schoolers (n 586) aged 3-6 years and early educators (n 378). RESULTS: Early educators' positive opinion of the food served at pre-school and the opinion that sufficient vegetables were available for the children were positively associated with children's vegetable consumption. Early educators' role modelling and a positive opinion of the food were negatively associated with children's energy intake. Encouragement to eat fruit and vegetables was associated with higher fibre intake. Intake of added sugar was low (4·4 % of energy). CONCLUSIONS: Some of the feeding practices and opinions of early educators were related to healthier dietary intake (higher vegetable consumption and fibre intake) among the children. However, in some respects, the results contradicted previous findings. Overall, early educators' feeding practices and opinions contribute to children's dietary intake and should be taken into account when promoting healthy food intake among pre-school children.

Preschool Environmental Factors, Parental Socioeconomic Status, and Children's Sedentary Time: An Examination of Cross-Level Interactions.

Preschool children's high levels of sedentary time (ST) is a public health concern. As preschool reaches a large population of children from different socioeconomic status (SES) backgrounds, more knowledge on how the preschool setting is associated with children's ST is relevant. Our aims were to examine (1) the associations of preschool setting (covering social, physical, and organizational level) with children's ST, and (2) the moderating role of the setting on the association between parental SES and children's ST. In the cross-sectional DAGIS (increased health and wellbeing in preschools) study, the participating children (n = 864, aged 3⁻6 years) were asked to wear an accelerometer for one week. In total, 779 children had valid ST accelerometer data during preschool hours. Preschool setting and parental SES was assessed by questionnaires and observation. Multilevel linear regression models with cross-level interactions were applied to examine the associations. Early educators' practice of breaking children's ST often, more frequent physical activity (PA) theme weeks, and higher number of physical education (PE) lessons were associated with lower children's ST. Higher parental SES was associated with higher children's ST in preschools (1) with organized sedentary behavior theme weeks, (2) with a lower number of PA theme weeks, and (3) with a lower number of PE lessons. The factors identified in this study could be targeted in future interventions.

Reproducibility of Preschool Personnel and Guardian Reports on Energy Balance-Related Behaviors and Their Correlates in Finnish Preschool Children.

Valid and reliable non-objective assessments of guardian and preschool personnel reports are necessary when estimating young children's health behaviors. This study examines the test-retest reproducibility of (a) guardian and preschool personnel questionnaires about correlates of preschool-aged children's energy balance-related behaviors (EBRBs), (b) a screen time diary, and (c) a food frequency questionnaire (FFQ) reported by a guardian. A sample of guardians having preschool-aged children (N = 69) and preschool personnel (N = 61) completed questionnaires twice within a five-week time interval during April⁻May 2018 in Finland. Intra-class correlations (ICC), kappas, and percentage agreement were calculated to test the test-retest-reproducibility. The guardian questionnaire for correlates of the children's EBRBs demonstrated mainly moderate to good reproducibility whereas the preschool personnel questionnaire of preschool correlates for children's EBRBs was mostly good. The reproducibility of the screen time diary was good and FFQ food items showed mostly moderate reproducibility. The reproducibility of the FFQ foods items for vegetables, fruit, and berries was slightly better for the amount consumed than for the frequency of consumption. To conclude, all the instruments are acceptable for use in future studies.

Parental Education and Pre-School Children's Objectively Measured Sedentary Time: The Role of Co-Participation in Physical Activity.

Parental co-participation in physical activity (PA) may be a beneficial parenting practice for diminishing children's sedentary time (ST). Less information is available, however, on the explanatory role of co-participation in PA regarding parental educational differences in children's ST. Preschool-aged children (N = 864, mean age 4.8, 52% boys) with their parents participated in a cross-sectional DAGIS (Increased Health and Wellbeing in Pre-schools) study between years 2015 and 2016. Children (N = 821) wore an accelerometer for one week. Parents were informed of their educational background, and the frequency of visits with their child in nature, to parks or playgrounds, their own yard, and indoor sport facilities (N = 808). Testing the associations required multiple regression analyses. Parents with a low educational background reported more frequent visits with their child to their own yard, and these visits were associated with children's lower ST. More highly educated parents co-visited indoor sport facilities more frequently, although this did not have a significant association with children's ST. More frequent visits in nature were associated with a lower ST at weekends, regardless of educational background. Future health promotion strategies should inform parents that frequent co-participation in PA, for example, in one's own yard, is beneficial for lowering children's ST.

Preschool children's context-specific sedentary behaviours and parental socioeconomic status in Finland: a cross-sectional study.

OBJECTIVES: This study examined the associations of parental socioeconomic status (SES) with preschoolers' objectively measured sedentary time (SED) over the course of a week and with parent-reported children's screen and reading times at home as indicators of sedentary behaviours (SB). DESIGN: Cross-sectional. SETTING: In years 2015 and 2016 in Finland. PARTICIPANTS: 864 children, aged 3-6 years, with their parents. OUTCOME MEASURES: Children's accelerometer data were transformed into average SED minutes per hour in different contexts (preschool, home during preschool days, weekend and total). Parent-reported children's screen and reading times were expressed as average daily minutes. The SES indicators (maternal and paternal education and relative household income) were grouped into three categories. Linear or logistic regression analyses were used, with municipality, season, and children's gender and age as covariates. CIs were adjusted for clustering at the preschool group level. RESULTS: Children with low maternal (ß=17.21, 95% CI: 8.71 to 25.71) and paternal (ß=10.54, 95% CI: 0.77 to 20.30) education had more overall screen time at home than their more advantaged counterparts. SES differences in overall screen time were mostly explained by TV viewing. Children with low as opposed to high maternal education (ß=-2.66, 95% CI: -4.95 to -0.38) had less reading time at home. Children whose fathers were on the middle (ß=-1.15, 95% CI: -2.01 to -0.29) educational level had less weekend SED than those with high paternal education. Otherwise, parental SES was not related to objectively measured SED. CONCLUSIONS: The results of this study highlight the fact that the associations between parental SES and preschoolers' SB are dependent on the indicators of SES and SBs, and vary between different contexts. Generally, parental SES was not associated with SED, whereas some SES differences existed in screen time and reading time at home. Interventions aiming to diminish SES differences in children's SB should focus on home hours. TRIAL REGISTRATION NUMBER: ISRCTN57165350.

The mediating role of the home environment in relation to parental educational level and preschool children's screen time: a cross-sectional study.

BACKGROUND: Previous studies suggest that preschoolers from low socioeconomic backgrounds engage in more screen time. Still, the factors in the social and physical home environment driving these differences in preschool children's screen time are poorly understood. This study examines potential home environment mediators in the associations between parental educational level and preschoolers' screen time. METHODS: A total of 864 children aged 3-6 years and their parents participated in a cross-sectional DAGIS study in 2015-2016. Parents recorded their children's screen time in a diary (N = 823). For the analyses, the daily average screen time at home was calculated. Parental questionnaires (N = 808) assessed educational level and eight social and physical environment factors in the home (i.e., descriptive norm for children's screen time, parental screen use in front of children, parental importance for limiting children's screen time, parental attitude toward societal pressures for children's screen time, access to screens at home, parental self-efficacy for limiting children's screen time, satisfaction of children's screen time, and rules for limiting children's screen time). Parental education was grouped into low, middle, and high education. The associations were tested by conducting mediation analyses adjusted by season and children's sex and age. The significant mediators in the single-mediator models were included in the final multiple-mediator models. RESULTS: Of the potential eight mediators, the following four had a significant indirect association: descriptive norm for children's screen time, parental screen use in front of children, parental importance for limiting children's screen time, and parental attitude toward societal pressures for children's screen time. Parents with high education had lower descriptive norm and used fewer screens in front of children compared to parents with middle or low education, and in turn, these factors were associated with less screen time among children from parents with a higher education level. Parents with high education placed greater importance on limiting children's screen time and felt less societal pressures about children's screen time compared to parents with low education, and in turn, these factors were associated with less screen time among children from parents with a higher education level. CONCLUSIONS: Our study recognized multiple modifiable mediators in the associations between parental education and preschool children's screen time. When aiming to diminish socioeconomic status differences in preschool children's screen time, the focus should be on parental role models, attitudes, and norm related to children's screen time.

Influencing factors of children's fruit, vegetable and sugar-enriched food intake in a Finnish preschool setting - Preschool personnel's perceptions.

INTRODUCTION: A large proportion of young children spend most of their weekdays at preschool in Western countries. In Finland, three meals are included in a full day at preschool. These meals have the potential to promote healthy eating. This study aimed to obtain the personnel's (preschool teachers, day-care nurses) views on the factors influencing children's fruit, vegetable, and sugar-enriched food intake at preschool. STUDY DESIGN: Four focus groups, in all 14 preschool personnel. Two researchers independently analysed the data using a socio-ecological framework. RESULTS: At the child level, age, peers, and the child's personality were recognized as factors influencing the fruit and vegetable (FV) and sugar-enriched food intake. At the preschool level, both the physical and social environments were discussed thoroughly, whereas at the societal level, policies of the EU, the state, and the municipality were mentioned as factors that influence what children eat in preschool. The personnel also discussed the interactions between factors both between levels and within levels. CONCLUSIONS: In Finnish preschools, children's food intake is influenced on and within several levels of the socio-ecological model. The identification of the factors influencing food intake allows different methods of intervention at multiple levels to promote healthy eating behaviours in preschools.

Validity of self-reported out-of-school physical activity among Finnish 11-year-old children.

BACKGROUND: The aim of this study is to assess the repeatability and validity of the Finnish 11-year old children's out-of-school physical activity (PA) questionnaire using accelerometer as reference method. A sub-sample of children (N = 155, 60 % participant rate) participating in the Finnish Health in Teens study was recruited in 2013. Children completed a questionnaire measuring PA two times, and wore an accelerometer for seven days. The questions and accelerometer data were transformed into average minutes of behaviors per day. Repeatability was measured by intra-class correlations. To test validity, Spearman correlations between the questions and accelerometer was checked and the Bland-Altman model was conducted. Kruskall-Wallis tests were conducted to examine the ranking capability of questionnaire. RESULTS: The intra-class correlations between two measurement times of questionnaire had substantial agreement. The Spearman correlations between the questions and accelerometer were poor. Based on Kruskal-Wallis tests, the questionnaire was moderately able to rank children according to their levels of PA. CONCLUSIONS: The repeatability of the questionnaire had substantial agreement among 11-years-old, whereas it moderately classifies objectively measured PA. If the aim is to measure children's duration of PA, the accelerometer might be a better measurement method to use among 11-year old children. If the aim is to classify children according to their behavior, then the used questionnaire is moderately appropriate.

Increased health and well-being in preschools (DAGIS): rationale and design for a randomized controlled trial.

BACKGROUND: Effective interventions that target socioeconomic status (SES) differences to avoid the potential widening of inequalities in health are needed. Children at preschool age is a valuable intervention target since sedentary behaviors, physical activity (PA), dietary behaviors, and sleep habits, jointly called the energy balance-related behaviors (EBRBs), are established in early childhood and tend to persist later in life. The interventions are most effective, when they focus on evidence-based factors. One potential factor associated with EBRBs and SES is children's stress regulation, which receives special attention in this study. Based on the socioecological approach, the combinations of multiple levels (e.g. individual, environmental, societal) of analysis and diverse methodologies (e.g. surveys, observations, biological measurements) are used to assess the healthfulness of environments (e.g. social, physical, learning, policy) in preschool and family settings. The intervention aimed to diminish SES differences in EBRBs is then conducted in the preschool setting. METHODS/DESIGN: The DAGIS study is divided into two phases. The first phase comprises focus group interviews and a cross-sectional survey. Parents and preschool personnel in low SES neighborhoods participated in interviews about children's sedentary behaviors, dietary behaviors, and PA in 2014. In the cross-sectional survey beginning in autumn 2015, preschools will be recruited from a random sample of preschools in 3-5 municipalities in Southern Finland. A total of 800 children will wear an accelerometer for seven days. Children's hair and saliva samples will be taken. Parents and preschool personnel will complete questionnaires on EBRBs, social and physical environments and SES factors. The quality of preschool environment is also observed. In the second phase, an intervention targeting to narrowing SES differences in EBRBs is conducted. The effects of the intervention will be evaluated in randomised controlled trial. The implementation of the intervention will also be evaluated. CONCLUSION: If effective, this unique preschool-based study will be able to narrow the SES differences in preschool children's EBRBs. This study is anticipated to identify the most important modifiable factors in preschool and family environmental settings associated with children's EBRBs, especially in children from low SES backgrounds. TRIAL REGISTRATION: ISRCTN57165350 (January, 8th, 2015).

The PRO GREENS intervention in Finnish schoolchildren - the degree of implementation affects both mediators and the intake of fruits and vegetables.

Little is known about the mediating effects of the determinants of fruit and vegetable (FV) intake in school-based interventions that promote FV intake, and few studies have examined the impact of the degree of implementation on the effects of an intervention. The present study examined whether the degree of implementation of an intervention had an effect on children's fruit or vegetable intake and determined possible mediators of this effect. The study is part of the European PRO GREENS intervention study which aimed to develop effective strategies to promote consumption of fruit and vegetables in schoolchildren across Europe. Data from 727 Finnish children aged 11 years were used. The baseline study was conducted in spring 2009 and the follow-up study 12 months later. The intervention was conducted during the school year 2009-2010. The effects were examined using multilevel mediation analyses. A high degree of implementation of the intervention had an effect on children's fruit intake. Knowledge of recommendations for FV intake and liking mediated the association between a high degree of implementation of the intervention and an increase in the frequency of fruit intake. Knowledge of recommendations for FV intake and bringing fruits to school as a snack mediated the association between a low degree of implementation of the intervention and an increase in the frequency of fruit intake. Overall, the model accounted for 34 % of the variance in the change in fruit intake frequency. Knowledge of recommendations acted as a mediator between the degree of implementation of the intervention and the change in vegetable intake frequency. In conclusion, the degree of implementation had an effect on fruit intake, and thus in future intervention studies the actual degree of implementation of interventions should be assessed when considering the effects of interventions.

Associations of parental influence and 10-11-year-old children's physical activity: are they mediated by children's perceived competence and attraction to physical activity?

AIMS: This cross-sectional study had two aims: firstly, to study the associations of parental influence in the form of encouragement, father and mother modelling and involvement on children's physical activity (PA), and secondly, to study the mediation effect of encouragement, father and mother modelling and involvement on children's PA through children's perceived competence and attraction to PA. METHODS: A total of 1278 children (response rate 79%), aged 10-11 years, participated in the study in the autumn of 2006. Of these children, 883 children completed all the data in a questionnaire assessing their self-reported PA, perceived competence, attraction to PA, and perceived parental influence. The associations were examined by multiple mediator analyses with bootstrapping method. All the models were adjusted with gender and grade. RESULTS: The analyses pointed out that father modelling had a direct effect on children's physical activity, whereas encouragement, mother modelling, and involvement had an indirect effect through perceived competence and attraction to physical activity on children's physical activity. The strongest indirect association was formed from encouragement through attraction to physical activity to children's physical activity. CONCLUSIONS: The results show that parents influence on children's physical activity in a variety of ways. Parents influence their children's physical activity in direct and indirect manners through their encouragement, involvement and modelling. Furthermore, mother and father influence their children's physical activity in different ways. This versatility should be taken into consideration in future interventions.