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. Author manuscript; available in PMC: 2016 Jan 20.

Published in final edited form as: Comput Stat Data Anal. 2013 Nov;67:199–212. doi: 10.1016/j.csda.2013.05.011

Table 5. Results of the ovarian cancer NCC study.

	Cox PH		plSI

	Est. (se)	p	Est. (se)	p
IL-6_q2	0.175 (0.243)	0.471	0.192 (0.249)	0.441
IL-6.q3	0.272 (0.241)	0.258	0.215 (0.246)	0.382
IL-6.q4	0.478 (0.238)	0.045	0.448 (0.244)	0.066

BMI	-0.026 (0.022)	0.241	-0.006 (0.003)	0.081
Age at menarche	0.035 (0.061)	0.564	0.037 (0.017)	0.032
Ever been pregnant	-0.248 (0.237)	0.294	-0.149 (0.069)	0.032
Ever use of OC	-0.277 (0.212)	0.192	-0.102 (0.042)	0.015
Ever use of HRT	0.468 (0.220)	0.033	0.571 (0.023)	< 0.001

IL-6_q2: the second quartile of IL-6; IL-6_q3: the third quartile of IL-6; IL-6_q4: the fourth quartile of IL-6.