. 2012 Nov 21;177(2):142–151. doi: 10.1093/aje/kws200

Table 4.

Adjusted Relative Risks and 95% Confidence Intervals for Type I and Type II Endometrial Carcinoma in Relation to Personal and Family Medical History in the NIH-AARP Diet and Health Study, 1995–2006

Self-reported (yes)	No. of Noncases	Subtypes
		Type I (n = 1,312)			Type II (n = 138)
		No.	RR^a	95% CI	No.	RR^a	95% CI
Diabetes	7,491	137	1.24	1.03, 1.49	18	1.67	1.00, 2.79
		P_{heterogeneity}^b = 0.25
First-degree family history of breast cancer	13,590	130	0.80	0.67, 0.96	28	1.93	1.27, 2.93
		P_{heterogeneity}^b = 0.002
First-degree family history of other cancer	39,072	466	1.01	0.90, 1.14	53	1.24	0.87, 1.75
		P_{heterogeneity}^b = 0.52

Abbreviations: CI, confidence interval; NIH, National Institutes of Health; RR, relative risk.

^a Adjusted for age (continuous), oral contraceptive use (ever/never), menopausal hormone therapy use (ever/never), parity (nulliparous, 1, 2, ≥3 births), body mass index (<30 vs. ≥30 kg/m²), menarche (<13, 13–14, ≥15 years), age at menopause (premenopausal, <45, 45–49, 50–54, ≥55 years), race (white/nonwhite), and smoking status (never, former, current smoker). Unknown/missing was set as a separate category within each factor.

^b P value from logistic regression of case-only analysis comparing each risk factor.