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. Author manuscript; available in PMC: 2022 Sep 1.
Published in final edited form as: Am J Obstet Gynecol. 2021 Apr 20;225(3):280.e1–280.e11. doi: 10.1016/j.ajog.2021.03.048

Table 3.

Live births for full cohort

Using Cox Regression
BMI category Metabolic Syndrome
(n= 254)
No Metabolic Syndrome
(n=492)
RR
(95% CI)
Adjusted *
RR
(95% CI)
p- value
#25-35 kg/m2 11/77
(14.3%)
52/175
(29.7%)
0.83
(0.75, 0.93)
0.89
(0.79, 1.00a)
0.04
>35 kg/m2 30/176
(17.1%)
39/199
(19.6%)
1.02
(0.92, 1.13)
1.04
(0.93, 1.15)
0.50
Using Modified Poisson Regression
BMI category Metabolic Syndrome
(n= 254)
No Metabolic Syndrome
(n=492)
RR
(95% CI)
Adjusted *
RR
(95% CI)
p- value
#BMI
25-35
11/77
(14.3%)
52/175
(29.7%)
0.86
(0.79, 0.93)
0.92
(0.83, 0.99)
0.04
BMI
>35
30/176
(17.1%)
39/199
(19.6%)
1.02
(0.94, 1.11)
1.04
(0.96, 1.13)
0.34
*

Rate Ratio for one-unit change in MetS z-score adjusted for BMI

#

Rate Ratio for adjusted BMI, age, current smoking = 0.89(0.79, 1.00)

a

Upper bound of confidence interval rounded from value of 0.997

*

Risk ratio for one-unit change in MetS z-score adjusted for BMI

#

Risk ratio adjusted for BMI, age, current smoking = 0.91 (0.83, 1.00)