Table 2.

Association between relative telomere length (RTL) in peripheral blood leukocytes and ovarian cancer risk, New England Case Control Study Phases 1 & 2 (1992-2003)

			Tertile of relative telomere length
	n	RTL mean (std)	T1 (shortest) OR (95% CI)*	T2 OR (95% CI)*	T3 (longest)
Controls n (%)	947	0.77 (0.51)	314 (33)	305 (32)	328 (35)
Cases n (%)	911	0.75 (0.40)	319 (35)	275 (30)	317 (35)
Overall			1.01 (0.80, 1.28)	0.95 (0.75, 1.20)	1.00
Serous	482	0.73 (0.37)	1.05 (0.79, 1.39)	0.94 (0.71, 1.25)	1.00
Mucinous	120	0.79 (0.39)	0.77 (0.46, 1.32)	1.41 (0.89, 2.24)	1.00
Endometrioid	132	0.77 (0.46)	0.88 (0.55, 1.42)	0.89 (0.55, 1.43)	1.00
Clear Cell	121	0.72 (0.41)	1.07 (0.66, 1.74)	0.84 (0.51, 1.39)	1.00

^*Odds ratios and 95% confidence intervals are age adjusted age, study center, study, oral contraceptive use (< 3 mo, 3 mo - 2yrs, 2-5yrs, >5yrs), parity (0,1,2,3,4+), tubal ligation, BMI (<21.9, 22-24.6, 25.7-28.3, >28.3), smoking (never, past, current), family history of breast or ovarian cancer, and race