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Table 5 Adjusted odds ratios and 95% confidence intervals for underweight in girls (Japan, 2001–2008)

From: Lifestyle factors associated with underweight among Japanese adolescents: a cross-sectional study

Lifestyle variables Total N Underweight n (%) AOR (95% CI) P value
Exercise
 Daily 612 65 (10.6) 1.00  
 Sometimes 132 17 (12.9) 1.34 (0.75–2.39) 0.331
 None 265 45 (17.0) 1.64 (1.07–2.51) P for trend = 0.021 0.022
Skipping breakfast     
 Yes 70 7 (10.0) 0.67 (0.29–1.55) 0.352
 No 939 120 (12.8) 1.00  
Snacking after dinner     
 Always or often 585 76 (13.0) 1.08 (0.73–1.60) 0.714
 Seldom or none 424 51 (12.0) 1.00  
Snacking while watching television or reading books
 Yes 455 58 (12.8) 0.97 (0.65–1.43) 0.867
 No 554 69 (12.5) 1.00  
Eating slowly     
 Yes 259 56 (21.6) 2.69 (1.81–3.98) <0.001
 No 750 71 (9.5) 1.00  
  1. AOR adjusted odds ratio, CI confidence interval
  2. Age (years), birthweight (<2500 g or ≥2500 g), and all lifestyle variables were included for adjustment