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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