. Author manuscript; available in PMC: 2016 Jan 31.

Published in final edited form as: Inflamm Bowel Dis. 2015 Feb;21(2):361–368. doi: 10.1097/MIB.0000000000000283

Table 5.

Measurement of Waist to Hip Ratio and Risk of Ulcerative Colitis and Crohn’s Disease (1993–2009)^*

	≤ 0.73	0.74–0.76	0.77–0.82	≥ 0.83
Person-years of follow-up	189,993	147,055	208,551	165,080
Crohn’s Disease
No. of cases	14	12	23	18
Age-adjusted HR (95% CI)	1.00	1.13 (0.52–2.44)	1.51 (0.78–2.94)	1.51 (0.75–3.04)	0.17
Multivariate-adjusted HR (95% CI)^§	1.00	1.15 (0.53–2.49)	1.54 (0.79–3.01)	1.58 (0.78–3.21)	0.14
Ulcerative Colitis
No. of cases	21	21	23	25
Age-adjusted HR (95% CI)	1.00	1.34 (0.73–2.46)	1.05 (0.58–1.90)	1.39 (0.78–2.50)	0.42
Multivariate-adjusted HR (95% CI)^§	1.00	1.37 (0.74–2.52)	1.07 (0.59–1.95)	1.44 (0.80–2.59)	0.37

Abbreviations: Hazard Ratio (HR), Confidence Interval (CI).

^§

Models adjusted for age (months), smoking (never, past, current), oral contraceptive use (never, past/current), physical activity at baseline in quintile (MET-hours/week), menopausal hormone therapy (premenopause, never, current, past).