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Table 2 Prevalence of depression (n and %) and its association with gender, grade, BMI, SES, SB time, alcohol consumption, smoking behavior, and unintentional injuries among urban high-school students in Nanjing, China

From: Physical activity inversely associated with the presence of depression among urban adolescents in regional China

  Prevalence n (%)  
  Depression Non-depression Adj. Odds ratio (95% CI)**
Gender    
   Girls 172 (13.6) 1092 (86.4) 1
   Boys 212 (18.0) 968 (82.0) 1.04 (0.79, 1.38)
School Grade    
   7 102 (13.3) 666 (86.7) 1
   8 145 (17.5) 684 (82.5) 1.06 (0.77, 1.45)
   9 137 (16.2) 710 (83.8) 0.84 (0.61, 1.17)
Body Mass Index    
   Non-overweight 329 (15.2) 1839 (84.8) 1
   Overweight 35 (19.1) 148 (80.9) 1.23 (0.97, 1.56)
   Obesity 20 (21.5) 73 (78.5) 1.43 (1.01, 2.02)
Parental job statuses    
   Both employed 256 (14.1) 1564 (85.9) 1
   Father unemployed 24 (24.0) 76 (76.0) 1.69 (0.96, 2.97)
   Mother unemployed 66 (18.4) 292 (81.6) 1.25 (0.89, 1.77)
   Both unemployed 38 (22.8) 128 (77.2) 1.60 (1.02, 2.51)
Family structure    
   Both parents 320 (15.0) 1818 (85.0) 1
   Single parent 40 (18.3) 178 (81.7) 1.11 (0.72, 1.70)
   Others 24 (27.3) 64 (72.7) 2.39 (1.35, 4.29)
Study time   
   Low 120 (14.4) 711 (85.6) 1
   Middle 128 (16.0) 671 (84.0) 1.03 (0.77, 1.38)
   High 136 (16.7) 678 (83.3) 1.12 (0.84, 1.49)
Sleep time   
   Low 155 (19.4) 643 (80.6) 1
   Middle 120 (15.1) 676 (84.9) 0.77 (0.58, 1.02)
   High 109 (12.8) 741 (87.2) 0.63 (0.47, 0.85)
TV time   
   Low 128 (15.9) 678 (84.1) 1
   Middle 99 (12.9) 671 (87.1) 0.84 (0.62, 1.13)
   High 157 (18.1) 711 (81.9) 1.27 (0.94, 1.67)
Alcohol consumption    
   Non 216 (12.2) 1558 (87.8) 1
   Yes 168 (25.1) 502 (75.9) 1.97 (1.55, 2.52)
Smoking behavior    
   Non 332 (14.3) 1984 (85.7) 1
   Yes 52 (40.5) 76 (59.5) 2.69 (1.80, 4.03)
Unintentional injuries    
   Non 207 (13.4) 1342 (86.6) 1
   Yes 177 (19.4) 718 (80.2) 1.45 (1.34, 1.86)
Overall 384 (15.7) 2060 (84.3) -
  1. n = number of participants within subgroup; % = Percentages across row.
  2. ** odds ratios adjusted for age, gender, school grade, BMI, TV time, study time, sleep time, smoking behavior, alcohol consumption, unintentional injuries, parents' educational attainments, parents' job statuses, family structure.
  3. † Study time, sleep time, and TV time were classified into tertiles, separately.