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Table 2 Odds ratios and 95% confidence intervervals for the associations between gestational weight gain and preterm birth overall and within strata of body mass index

From: Associations between gestational weight gain and preterm birth in Puerto Rico

  

Body Mass Index

 

Total

Underweight

Normal

Overweight

Obese

Gestational Weight Gain

OR (95% CI)

OR (95% CI)

OR (95% CI)

OR (95% CI)

OR (95% CI)

Adjusted

  Low

1.34 (1.30, 1.37)

1.56 (1.45, 1.68)

1.39 (1.35, 1.44)

1.29 (1.21, 1.37)

1.00 (0.93, 1.07)

  Adequate

Ref

Ref

Ref

Ref

Ref

  Excessive

0.99 (0.97, 1.02)

0.99 (0.89, 1.09)

1.06 (1.02, 1.10)

0.98 (0.94, 1.03)

0.94 (0.89, 0.99)

Unadjusted

  Low

1.25 (1.22, 1.28)

1.33 (1.25, 1.43)

1.32 (1.27, 1.36)

1.25 (1.18, 1.32)

0.95 (0.89, 1.01)

  Adequate

Ref

Ref

Ref

Ref

Ref

  Excessive

1.15 (1.13, 1.18)

1.19 (1.09, 1.30)

1.25 (1.21, 1.29)

1.10 (1.06, 1.15)

1.03 (0.98, 1.08)

  1. Note: models adjusted for maternal age, maternal education, marital status, and birth weight for gestational age
  2. Abbreviations: OR Odds ratio, CI Confidence interval, Ref Reference