Table 4.

Association between fruit consumption and risk of pharyngeal cancer by HPV16 serology.

Fruit consumption	Servings/ week	HPV16 serology	Cases		Controls		Stratified Model		Joint Effects Model
			n	%	n	%	OR*	95% CI	OR*	95% CI
Total	≤9.4	Negative	36	29.5	140	28.4	Referent		Referent
Fruit	>9.4 to 16.7		16	13.1	151	30.6	0.47	0.24, 0.93	0.47	0.24, 0.93
	>16.7		11	9.0	149	30.2	0.39	0.17, 0.87	0.39	0.17, 0.87
	≤9.4	Positive	22	18.0	25	5.1	Referent		3.85	1.81, 8.19
	>9.4 to 16.7		21	17.2	13	2.6	2.32	0.87, 6.19	8.92	3.80, 20.95
	>16.7		16	13.1	15	3.0	1.69	0.59, 4.82	6.49	2.62, 16.05
									Pinteraction=0.01
Citrus	≤2.2	Negative	39	32.0	139	28.2	Referent		Referent
Fruit	>2.2 to 7.2		11	9.0	147	29.8	0.31	0.15, 0.65	0.31	0.15, 0.65
	>7.2		13	10.7	154	31.2	0.36	0.17, 0.76	0.36	0.17, 0.76
	≤2.2	Positive	19	15.6	28	5.7	Referent		2.37	1.13, 5.0
	>2.2 to 7.2		19	15.6	12	2.4	3.55	1.28, 9.86	8.41	3.43, 20.62
	>7.2		21	17.2	13	2.6	4.20	1.53, 11.51	9.96	4.16, 23.83
									Pinteraction<0.001

^*Odds ratios adjusted for age, gender, race, pack-years of smoking, alcohol, total energy intake, BMI and education.