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. Author manuscript; available in PMC: 2020 Jun 1.
Published in final edited form as: Semin Arthritis Rheum. 2018 Oct 11;48(6):1030–1034. doi: 10.1016/j.semarthrit.2018.10.004

Table 3.

Relationship between Body Mass Index (BMI) at Age 18 and Risk of SLE among 55,951 women in the Black Women’s Health Study

BMI at age 18
(kg/m2)		 Cases/person-
years		 Age and questionnaire
period- adjusted HR (95%CI)* 		Multivariable-adjusted
HR (95%CI)**
       
< 20 49/378,566 1.10 (0.74, 1.63) 1.05 (0.71, 1.56)
20–24.9 51/412,108 Ref. Ref.
25–29.9 15/90,642 1.28 (0.72, 2.28) 1.25 (0.70, 2.23)
  30+ 12/37,132 2.48 (1.32, 4.67) 2.38 (1.26, 4.51)
       

HR=hazard ratio; CI=confidence interval

*

Model 1: adjusted for age and period

**

Model 2: adjusted for age, period, age began alcohol intake (≤ 20 years), age began smoking (≤ 18 years), age began use of oral contraceptives (≤ 18 years of age), vigorous activity at age 21, age at menarche, and parental education.