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Table 3 Odds ratios of gestational weight gain during second pregnancy associated with GDM

From: Weight retention at six weeks postpartum and the risk of gestational diabetes mellitus in a second pregnancy

 

Number of GDM in the second pregnancy

Unadjusted OR (95% CI)

Adjusted*#

OR (95% CI)

β value

SE

Wald χ2

P

All women*

 Gestational weight gain during the second pregnancy

  Inadequate

485

1.65(1.41~1.91)

1.67(1.43~1.93)

0.51

0.08

44.49

< 0.001

  Adequate

365

1

1

/

/

/

/

  Excessive

248

1.04(0.87~1.23)

1.04(0.88~1.24)

0.05

0.09

0.26

0.610

BMI (kg/m2) in the first pregnancy < 25#

 Gestational weight gain during the second pregnancy

  Inadequate

374

1.69(1.42~2.00)

1.69(1.42~2.01)

0.53

0.09

35.61

< 0.001

  Adequate

274

1

1

/

/

/

/

  Excessive

189

1.06(0.87~1.30)

1.09(0.89~1.34)

0.09

0.10

0.71

0.401

BMI in the first pregnancy ≥25#

 Gestational weight gain during the second pregnancy

  Inadequate

111

1.53(1.13~2.07)

1.54(1.14~2.09)

0.43

0.16

7.72

0.005

  Adequate

91

1

1

/

/

/

/

  Excessive

59

0.96(0.67~1.36)

0.94(0.66~1.34)

−0.06

0.18

0.10

0.752

  1. BMI, body mass index; GDM, gestational diabetes mellitus; OR, odds ratio; SE, standard error
  2. * Model adjusted for interpregnancy interval, BMI in the first pregnancy, interpregnancy BMI change, and BMI change at six weeks postpartum after the first pregnancy
  3. # Model adjusted for interpregnancy interval, interpregnancy BMI change, and BMI change at six weeks postpartum after the first pregnancy