. Author manuscript; available in PMC: 2021 Feb 7.

Published in final edited form as: PM R. 2020 May 11;13(2):144–152. doi: 10.1002/pmrj.12381

Table 3.

Association between Parity and CPEI – reported CPEI mean (95% CI) and p-value for linear trend

	Unadjusted	Model 1^†	Model 2^‡	Model 3A^§	Model 3B^¶
0 Children	19.1 (18.2 – 20.1)	19.8 (18.6 – 21)	19.5 (18.3 – 20.7)	19.4 (18.2 – 20.5)	19.4 (18.2 – 20.5)
1–2 Children	18.9 (18.4 – 19.4)	19.5 (18.6 – 20.3)	19.2 (18.3 – 20.1)	19.2 (18.3 – 20)	19.2 (18.4 – 20)
3–4 Children	18 (17.5 – 18.6)	18.7 (17.8 – 19.7)	18.7 (17.8 – 19.6)	18.6 (17.7 – 19.5)	18.7 (17.7 – 19.6)
≥5 Children	17.5 (16.4 – 18.6)	18.2 (16.9 – 19.6)	18.5 (17.1 – 19.8)	18.4 (17.1 – 19.7)	18.5 (17.2 – 19.8)
p-value for linear trend:	0.0021	0.0052	0.0919	0.0976	0.1112

^†:

Model 1: adjusted for race and clinic site

^‡:

Model 2: model 1 plus additionally adjusted for age

^§:

Model 3A: model 2 plus additionally adjusted for BMI at 60m (current)

^¶:

Model 3B (sensitivity): model 2 plus additionally adjusted for BMI at 25 years-old (self-reported)

Abbreviations: CPEI, center of pressure excursion index; CI, confidence interval