Physical Activity and the Prevention of Depression A Systematic Review of Prospective Studies George Mammen, MSc, Guy Faulkner, PhD Appendix A Methodologic characteristics of prospective studies examining physical activity and depression Study, location Aberg (2012)16 Sweden Augestad (2008)17 Norway Backmand (2003)18 Finland Ball,19 2008,Australia Bernaards (2006)20 Netherlands Baseline age (years), gender 18 M only 21–40 M and F Mean=65 M only 22–27 F only Unreported Follow-up period (years) 3–40 N included in prospective analysis 1,117,294 10 6,661 Measures of physical activity Cardiovascular fitness via cycle ergometer test Self-reported 10 1,164 Self-reported Measures of depression (cut-off scores to define depression) Swedish National Hospital Discharge Register Hospital Anxiety and Depression Scale, depression subscale (HADS-D: ≥8) Brief Symptom Inventory (BSI-53: ≥8) 3 6,677 Self-reported CESD-10: ≥10 Logistic regression 3 1,747 Self-reported CESD-11: ≥6 Generalized estimating equation modeling Logistic regression Brown (2005)21 Australia 45–50 F only 5 9,207 Self-reported Camacho (1991)22 USA Carroll (2010)23 USA Cooper-Patrick (1997)24 USA ≥20 M and F 51–61 M and F Unreported (during medical school and midlife) M and F 9 6,928 Self-reported 6 5,389 Self-reported CESD-10: ≥10 and mental health subscale ≤52 of Short Form (SF-36) functioning and well-being scale 40-item measure constructed independently by researchers: ≥5 CESD-8: women/girls ≥4; men/boys ≥3 752 Self-reported General Health Questionnaire: ≥4 Am J Prev Med 2013;45(5) 15 Methods of analysis Cox regression Logistic regression Logistic regression Logistic regression Logistic regression Cox regression A-1 Study, location Farmer (1988)25 USA Gallegos-Carillo (2012)26 Mexico Hamer (2009)27 England Jerstad (2010)28 USA Baseline age (years), gender 25–77 M and F ≥18 M and F Follow-up period (years) 8 N included in prospective analysis 1,497 Measures of physical activity Self-reported Measures of depression (cut-off scores to define depression) CESD-20: ≥16 Methods of analysis Logistic regression 6 1,047 Self-reported CESD-20: ≥16 Logistic regression Mean=63 M and F 11–15 F only 4 4,323 Self-reported CESD-8: ≥4 Logistic regression 6 496 Self-reported Generalized Linear Model regression Jonsdottir (2010)29 Sweden Kritz-Silverstein (2001)30 USA Ku (2009)31 Taiwan Lampinen (2000)32 Finland Lucas (2011)33 USA Mean=47 M andF 50–89 M and F 2 3,114 Self-reported 8 944 Self-reported The Schedule for Affective Disorders and Schizophrenia for School-Age Children: ≥5 Hospital Anxiety and Depression Scale (HAD: ≥10) Beck Depression Inventory (BDI: ≥13) ≥50 M and F 65–84 M and F 30–55 F only 7 2,831 Self-reported CESD-10: ≥10 Logistic regression 8 663 Self-reported Beck Depression Inventory (BDI: ≥5) Logistic regression 10 49,821 Self-reported Cox regression Mikkelsen (2010)34 Denmark Mobily (1996)35 USA Morgan (1998)36 UK Paffenbarger (1994)37 USA Rothon (2010)38 England Smith (2010)39 USA Strawbridge (2002)40 USA ≥20 M and F ≥65 M and F ≥65 M and F 35–74 M only 26 14,223 Self-reported Defined as reporting a physician’s diagnosis of depression or the use of antidepressants Also used CESD-10: ≥10 Danish Hospital Discharge Register 3 2,084 CESD-11:>15 Logistic regression 4 497 Self-reported via interview Self-reported via interview Self-reported Symptoms of Anxiety and Depression (SAD: ≥6) Questionnaire developed by researchers Logistic regression 11–14 M and F 71–93 M only 50–94 M and F 2 2,093 Self-reported Logistic regression 8 1,417 Self-reported Short Moods 7 Feelings Questionnaire (SMFQ: ≥8) CESD-11: ≥9 or taking antidepressants 5 1,947 Self-reported DSM-12D: ≥5 Logistic regression Am J Prev Med 2013;45(5) 23–27 10,201 Cox regression ANCOVA Cox regression Cox regression Logistic regression A-2 Study, location Sund (2011)41 Norway van Gool (2006)42 Netherlands Wang (2011)43 Canada Baseline age (years), gender 12–15 M and F 24–81 M and F ≥12+ M and F Weyerer (1992)44 Germany ≥15 M and F Wise, 200645, USA Follow-up period (years) 1–2 6 2, 4, and 6 5 N included in prospective analysis 2,360 Measures of physical activity Self-reported 1,169 Self-reported 17,276 Self-reported 1,341 Self-reported via interview 21–69 4 35,224 Self-reported F only CESD, Center for Epidemiologic Studies Depression Scale; F, female; M, male Am J Prev Med 2013;45(5) Measures of depression (cut-off scores to define depression) Mood and Feelings Questionnaire (MFQ: ≥25) CESD-20: ≥16 Methods of analysis Logistic regression Logistic regression Composite International Diagnostic Interview Short Form for Depression (CIDI-SF: ≥90%) Interviewed by trained psychiatrist using the ICD Cox regression CESD-10: ≥16 Logistic regression Logistic regression A-3 Appendix B Findings of Prospective Studies Examining Physical Activity and Depression Study Aberg (2012)16 Augestad (2008)17 Backmand (2003)18 Ball (2009)19 Bernaards (2006)20 Brown (2005)21 Odds of developing depression Subjects with low levels of cardiovascular fitness at T1 were at an increased risk for developing depression (HR=1.96) at T2 Men/boys (OR=0.63) and women/girls (OR=0.69) reporting low and medium levels of PA, respectively, at T1 were at a decreased risk of developing depression at T2 relative to inactive subjects Subjects reporting low (OR=3.77) PA (0.39 MET/day) at T1 were at an increased risk of developing depression at T2 relative to those with extremely high PA Subjects reporting low PA levels (OR= 0.77; <150 min/week) and high PA (OR=0.79; >150 min/week) at T1 were at a decreased risk of developing depression at T2 relative to sedentary women. Subjects reporting strenuous PA one or two times per week (OR=0.62) at T1 were at a decreased risk of developing depression at T2 relative to those who reported strenuous PA less than once per month Subjects reporting low PA (OR=0.92; 60– 150 min moderate PA/week); moderate PA (OR=0.81; 150–300 min moderate PA/week); and high PA levels (OR=0.73; >300 min of moderate PA/week) at T1 were at a decreased risk of developing future depression at T2 relative to those reporting very low levels of PA Am J Prev Med 2013;45(5) Changes in PA levels and relationship to depression Unreported Did PA prevent depression? Yes Unreported Yes Age/BMI/education/alcohol/smoking/living arrangements Unreported Yes Age/health/SES/ alcohol/smoking/marital status/personality characteristics/life events Subjects who increased their PA level from none/very low to either moderate (OR=0.65) or high level (OR=0.50) were at a decreased risk of future depressive symptoms Unreported Yes Health disabilities/BMI/education/smoking status/marital status/occupation/parity status Yes Gender/time of measurement/outcome of measurement Subjects who increased their PA were at a decreased risk (OR=0.83) of developing future depression compared to those who remained inactive Yes Chronic conditions/menopause status/ BMI/education/smoking/marital status/occupation/area of residence/country of birth Covariates accounted for in prospective analysis Calendar year/BMI/region/health tests/parent education level A-4 Camacho (1991)22 Carroll (2010)23 Cooper-Patrick (1997)24 Farmer (1988)25 Gallegos-Carrillo (2012)26 Hamer (2009)27 Jerstad (2010)28 Subjects reporting low PA levels (OR=1.75;0–4 points on activity index) at T1 were at an increased risk of developing depression at T2 relative to those with high PA levels Women/girls who decreased their vigorous PA levels from high (>3 times/week) to low (1–3 times/month) were at a higher risk (OR=1.66) of developing depression at T2 in relation to those who maintained their PA levels No significant longitudinal associations Women/girls reporting little/no PA (OR= 1.9) at T1 were at an increased risk of developing depression at T2 Subjects reporting moderately active PA patterns (OR=0.62; >11.01 to <27.18 MET hr/week) and highly active PA patterns (OR=0.47; >27.18 METs) at T1 were at a decreased risk of developing depression at T2 relative to those who were inactive Subjects reporting moderate (OR=0.73; 1/week) and vigorous (OR=0.60; >1/week) PA levels at T1 were at a decreased risk of developing depression at T2 relative to those with none/mild PA levels Subjects reporting PA at T1 were at a decreased risk of developing depressive symptoms (RR=0.99); minor depression (RR=0.90); and major depression (RR=0.86) at T2 Am J Prev Med 2013;45(5) Subjects who decreased their activity (OR=1.61) were at an increased risk of developing depression Yes Age/gender/physical health/SES/ alcohol/smoking/social supports/life events/anomy/ status/weight Women/girls who decreased their vigorous PA levels from high (>3 times/week) to low (1–3 times/month) were more likely (OR=1.66) to develop depression at followup in relation to those who maintained their PA levels Unreported Yes in women/girls/ No for men/boys Number of chronic diseases/SES/education level/smoking/alcohol/psychopharmacologic treatment/marital status/ number of activities of daily living difficulties No Gender/age/smoking/substance abuse Unreported Yes in women, no in men Age/chronic conditions/education/employment status/income/length of follow-up Yes Gender/chronic conditions/mobility problems/BMI/education/tobacco/marital status/tobacco/mobility problems Unreported Subjects who decreased their PA levels were at an increased risk of developing future depression (OR=1.56) relative to those who maintained stable levels of PA Unreported Yes Age/gender/long-standing illnesses/SES/smoking/alcohol Yes Body satisfaction/bulimic symptoms/social support/BMI A-5 Jonsdottir (2010)29 Kritz-Silverstein (2001)30 Ku (2009)31 Lampinen (2000)32 Lucas (2011)33 Mikkelsen (2010)34 Subjects reporting light PA (RR=0.37; gardening for 2 hr/week) or moderatevigorous PA (RR=0.29; dancing/swimming for 2–5 hr/week) at T1 were at a decreased risk of developing depression at T2 relative to sedentary participants No significant longitudinal associations Subjects reporting PA less than 2 times/week (OR=1.34) at T1 were at an increased risk of developing depression at T2 relative to subjects engaging in PA ≥3 times/week Subjects reporting low PA levels (OR=10.56; regular walking) at T1 were at an increased risk of developing depression at T2 relative to those with high levels of regular walking PA Subjects reporting 10–29 min of PA/day (RR=0.90); 30–59 min of PA/day (RR=0.91); 60–89 min of PA/day (RR=0.84); and ≥90 min/day (RR=0.80) at T1 were at a decreased risk of developing depression at T2 relative to those engaging in <10 min of PA/day Depression risk decreased with increasing time spent walking at an ‘average pace’ (<20 min/day, RR=0.94; 20–40 min/day, RR=0.94; ≥40 min/day, RR=0.80) or brisk/very brisk pace (<20 min/day, RR=0.95; 20–40 min/day, RR=0.88; ≥40 min/day, RR=0.83) but not related to time spent walking at an easy pace Women/girls reporting low LTPA (HR=1.80; <2 hr/week) at T1 were at an increased risk of developing depression at T2 relative to women/girls reporting moderate levels of LTPA (HR=1.07;>2 hr/week) Am J Prev Med 2013;45(5) Unreported Yes Age/gender/BMI/education/anxiety Unreported No Age/BMI/smoking/alcohol/social support/estrogen use Yes Age/gender/chronic diseases/health status/SES/income satisfaction/education/alcohol/smoking/marital status/ living status/social support Subjects who decreased PA (OR=10.56) in the “regular walking group” were at an increased risk of developing future depression relative to those who remained active or increased their PA levels Unreported Yes Age/gender/health status/SES/physical functioning/changes in PA/stability of PA Yes Age/BMI/postmenopausal hormone/marital status/community involvement/smoking/total energy intake/coffee intake/diabetes/cancer/high blood pressure/arthritis/osteoarthritis/asthmas/emphysema/ TV watching/physical limitations Unreported Yes for women/ no for men Age/chronic disease/BMI/education/income/ smoking/alcohol/occupational PA No significant findings A-6 Mobily (1996)35 Morgan (1998)36 Paffenbarger (1994)37 Rothon (2010)38 Smith (2010)39 Strawbridge (2002)40 Sund (2011)41 van Gool (2006)42 No significant longitudinal associations Subjects reporting lower levels of PA (outdoor/leisure activities) at T1 were at an increased risk (OR=0.92/hr of activity) of developing depression at T2 Subjects who expended between 1000 and 2499 kcal/week (RR=0.83) and >2500 kcal/week (RR=0.72) at T1 were at a decreased risk of developing depression at T2 No significant longitudinal associations Unreported Unreported No Yes Age/gender/physical illness/marital status/smoking/ Age/health Index score/social engagement/social class Unreported Yes Age/smoking/alcohol No significant findings No General health/long-standing behaviors/health behaviors Subjects reporting intermediate (0.25– 1.5 miles/day, OR= 0.52) and high (>1.5 miles/day, OR= 0.61) levels of walking at T1 were at a decreased risk of developing depression at T2 relative to those with low levels of walking Subjects with greater PA levels at T1 were at a decreased risk of developing depression (OR=0.83) at T2 Subjects reporting low-vigorous PA (OR= 1.23; <3 hr/week) and sedentary behavior (OR=1.22) at T1 were at an increased risk of developing depression at T2 Subjects reporting >30 min of PA/day (RR=0.52) at T1 were at a decreased risk of developing depression at T2 relative to those reporting no PA Unreported Yes Age/education/marital status/BMI/cardiovascular risk factors/hypertension/alcohol/smoking/diabetes/prevalent diseases/functional impairment Unreported Yes Unreported Yes Age/gender/ethnicity/financial strain/chronic conditions/disability/BMI/alcohol/smoking/social relations Age/gender/parental SES/ethnicity/somatic disease/ pubertal development/BMI/obesity/physical impairment Subjects who maintained PA throughout (RR=0.56) decreased their risk of future depression relative to those who were inactive throughout Women/girls who decreased their PA overtime (HR=1.49) were more likely to develop depression relative to those who remained active Yes Age/gender/marital status/education level/ instrumental activities of daily living/chronic diseases Yes in women No in men Age/gender/chronic disease/activity prevented due to pain/BMI/smoking/alcohol/marital status/working status/income/education/restriction of activity/perceived social support/self-rated health Unreported No Age/gender/physical health/somatic disorders/social class Wang (2011)43 Women/girls who were inactive at T1 (HR=1.27; <1.5 kcal/kg) and T2 (HR=1.22; <1.5 kcal/kg) were at an increased risk of developing future depression at T3, relative to those who were active Weyerer (1992)44 No significant longitudinal associations Am J Prev Med 2013;45(5) A-7 Wise (2006)45 Women reporting 7+ hours/week of PA (OR=0.75) at T1 were at a decreased risk of developing depression at T2 relative to those who reported no vigorous PA Women who maintained their activity levels in both high school (≥5 hr/week) and adulthood (≥ 2hr/week) were at a decreased risk of developing future depression (OR=0.76) relative to neveractive women (OR=0.90) or women who were active in high school but inactive in adulthood (OR=0.83) or women who were inactive in high school but active in adulthood Yes Age/education/occupation/marital status/geographic region/BMI/health conditions/energy intake/smoking/alcohol/child care responsibilities F, female; HR, hazard ratios; hr, hour(s); Kcal, kilocalories; LTPA, leisure-time physical activity; M, male; 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