Table 4.

Estimated cumulative odds ratio (95% confidence intervals) of being clustered into the “high” exposure pattern^a by selected determinants in backward elimination^b.

Selected variablesc	Odds ratio	95% CI	P-valued
Black vs. white women	0.39	0.26, 0.56	<.0001
Chinese vs. white women	2.10	1.19, 3.69	0.01
Japanese vs. white women	2.32	1.39, 3.90	0.001
Former vs. never smoker	1.03	0.78, 1.37	0.84
Current vs. never smoker	2.25	1.47, 3.44	0.0002
Seafood intake 1–1.9 /wk vs. <1 time/wk	1.31	0.96, 1.77	0.09
Seafood intake ≥2 vs. <1 time/wk	1.83	1.34, 2.50	0.0001
Rice intake 1.5–3.4 /wk vs. <1.5 times/wk	1.07	0.80, 1.44	0.65
Rice intake ≥3.5 vs. <1.5 times/wk	1.68	1.09, 2.59	0.02

^aParticipants with “high” vs. “low” exposure patterns were clustered by k-means clustering method.

^bInitial model included race/ethnicity, education, financial hardship, smoking, secondhand smoking, seafood intake and rice intake. Age, study sites, and total energy intake, were forced in model selection.

^cReference groups: race/ethnicity: white women; smoking: never smoker; seafood intake: <1 time/week; rice intake: <1.5 times/week.

^dPs <0.05 for all selected variables in backward elimination.