Table 3 Odds ratio (95% CI) of PPD according to each weight-loss method.

From: Weight-loss behaviors before pregnancy associate with increased risk of postpartum depression from the Japan Environment and Children’s Study

Weight-loss methods

N

Crude

Adjusteda

OR

Lower 95% CI

Higher 95% CI

OR

Lower 95% CI

Higher 95% CI

Eating two-thirds as much as usual or less

 No

53,965

1.000

  

1.000

  

 Yes

8095

1.570

1.472

1.673

1.324

1.236

1.418

Avoiding snacking and midnight snacks

 No

38,482

1.000

  

1.000

  

 Yes

23,578

1.155

1.099

1.213

1.101

1.045

1.160

Eating specific diet foods

 No

55,948

1.000

  

1.000

  

 Yes

6112

1.498

1.392

1.610

1.250

1.156

1.351

Taking diet pills

 No

60,835

1.000

  

1.000

  

 Yes

1225

1.906

1.652

2.191

1.308

1.122

1.520

Vomiting after eating

 No

61,209

1.000

  

1.000

  

 Yes

851

2.484

2.119

2.901

1.743

1.465

2.065

Smoking cigarettes

 No

59,502

1.000

  

1.000

  

 Yes

2558

2.188

1.985

2.408

1.432

1.287

1.591

Exercise

 No

42,313

1.000

  

1.000

  

 Yes

19,747

1.243

1.182

1.308

1.132

1.072

1.194

  1. EPDS Edinburgh Postnatal Depression Scale, PPD postpartum, depression, CI confidence interval, OR odds ratio.
  2. aAdjusted for age of mother, sex, mode of delivery, number of previous deliveries, marital status, feelings when learning about pregnancy, stressful events, emotional support, highest level of education, annual household income, emotional abuse from partner, physical abuse from partner, BMI before pregnancy, disease in child currently under treatment, how the mother became pregnant this time, recurrent miscarriage, psychological distress, and gestational weight gain.