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Recent research demonstrates that youth fitness improvements are associated with lower absenteeism. This study assessed whether the effects of poverty on the longitudinal fitness-absenteeism relationship are consistent across poverty measures at the student, school, and neighborhood levels and across sex in New York City (NYC) public school youth individually followed over 4 years. Negative binomial longitudinal mixed models with random-intercepts were developed stratified by five dichotomized student, school and neighborhood poverty measures and sex to test the change in fitness-lagged absenteeism relationship in six cohorts of NYC middle school students (2006/7-2012/13). Models were adjusted for individual-level race/ethnicity, place of birth, change in obesity status, grade, time, and school size. The sample included 360,743 students (51% male, 39% Hispanic, 28% non-Hispanic black, 69% qualifying for free/reduced price school meals). Adjusted estimates showed an inverse dose-response fitness-absenteeism relationship in high poverty youth across all poverty measures, including the student, school and neighborhood levels. For example, in girls exposed to high poverty based on school neighborhood, absenteeism decreased by 11.3% (IRR = -0.12, 95% CI: -0.20, -0.04), 10.4% (IRR = -0.11, 95% CI: -0.21, -0.02), 6.8% (IRR = -0.07, 95% CI: -0.14, 0.00) and 4.9% (IRR = -0.05, 95% CI: -0.15, 0.04) for students who had a >20% increase, 10-20% increase, <10% change, and 10-20% decrease in fitness from the prior year, respectively, relative to the reference group (>20% decrease in fitness). Future research should explore the impact of tailored interventions for youth that aim to promote youth physical activity at each of the individual, school and neighborhood levels, and particularly among high poverty subgroups., (Copyright © 2019 Elsevier Inc. All rights reserved.)

Background: Extensive research demonstrates the benefits of fitness on children's health and academic performance. Although decreases in health-related fitness may increase school absenteeism, multiple years of prospective, child-level data are needed to examine whether fitness changes predict subsequent chronic absenteeism status., Methods: Six cohorts of New York City public school students were followed from grades 5-8 (2006/2007-2012/2013; N = 349,381). A longitudinal 3-level logistic generalized linear mixed model with random intercepts was used to test the association of individual children's changes in fitness and 1-year lagged chronic absenteeism., Results: The odds of chronic absenteeism increased 27% [odds ratio (OR) 95% confidence interval (CI), 1.25-1.30], 15% (OR 95% CI, 1.13-1.18), 9% (OR 95% CI, 1.07-1.11), and 1% (OR 95% CI, 0.98-1.04), for students who had a >20% decrease, 10%-20% decrease, <10% increase or decrease, and 10%-20% increase in fitness, respectively, compared with >20% fitness increase., Conclusion: These findings contribute important longitudinal evidence to a cross-sectional literature, demonstrating reductions in youth fitness may increase absenteeism. Given only 25% of youth aged 12-15 years achieve the recommended daily 60 minutes or more of moderate to vigorous physical activity, future work should examine the potential for youth fitness interventions to reduce absenteeism and foster positive attitudes toward lifelong physical activity.

Purpose: One-fifth to one-third of students in high poverty, urban school districts do not attend school regularly (missing ≥6 days/year). Fitness is shown to be associated with absenteeism, although this relationship may differ across poverty and gender subgroups., Methods: Six cohorts of New York City public school students were followed up from grades 5 to 8 during 2006/2007-2012/2013 (n = 349,381). Stratified three-level longitudinal generalized linear mixed models were used to test the association between changes in fitness and 1-year lagged child-specific days absent across gender and poverty., Results: In girls attending schools in high/very high poverty areas, greater improvements in fitness the prior year were associated with greater reductions in absenteeism (P = .034). Relative to the reference group (>20% decrease in fitness composite percentile scores from the prior year), girls with a large increase in fitness (>20%) demonstrated 10.3% fewer days absent (incidence rate ratio [IRR] 95% confidence interval [CI]: 0.834, 0.964), followed by those who had a 10%-20% increase in fitness (9.2%; IRR 95% CI: 0.835, 0.987), no change (5.4%; IRR 95% CI: 0.887, 1.007), and a 10%-20% decrease in fitness (3.8%; IRR 95% CI: 0.885, 1.045). In girls attending schools in low/mid poverty areas, fitness and absenteeism also had an inverse relationship, but no clear trend emerged. In boys, fitness and absenteeism had an inverse relationship but was not significant in either poverty group., Conclusions: Fitness improvements may be more important to reducing absenteeism in high/very high poverty girls compared with low/mid poverty girls and both high/very high and low/mid poverty boys. Expanding school-based physical activity programs for youth particularly in high poverty neighborhoods may increase student attendance., (Copyright © 2018 Elsevier Inc. All rights reserved.)

Introduction: Youth health-related fitness positively affects academic outcomes, although limited research has focused on the relationship between fitness and school absenteeism. We examined the longitudinal association between individual children's fitness and lagged school absenteeism over 4 years in urban middle schools., Methods: Six cohorts of New York City public school students were followed from grades 5 through 8 (school years 2006-2007 through 2012-2013; n = 349,381). A 3-level longitudinal generalized linear mixed model was used to test the association of change in fitness composite percentile scores and 1-year lagged child-specific days absent., Results: Adjusted 3-level negative binomial models showed that students with a more than 20% increase, 10% to 20% increase, less than 10% increase or decrease, and 10% to 20% decrease in fitness from the year prior had 11.9% (95% confidence interval [CI], 7.2-16.8), 6.1% (95% CI, 1.0-11.4), 2.6% (95% CI, -1.1 to 6.5), and 0.4% (95% CI, -4.3 to 5.4) lower absenteeism compared with students with a more than 20% fitness decrease., Conclusion: Cumulative effects of fitness improvement could have a significant impact on child absenteeism over time, particularly in high-need subgroups. Future research should examine the potential for school-based fitness interventions to reduce absenteeism rates, particularly for youths who have fitness drop-offs in adolescence.