Table 3. Height, weight and body mass index in never, former and current smokers: Odds ratios (OR) and confidence intervals (95% CI) for oral cavity and oropharyngeal cancer, Spain 1996–1999.

	Never smokers			Former smokers			Current smokers
	Ca/Coa	ORb	95% CI	Ca/Coa	ORc	95% CI	Ca/Coa	ORc	95% CI
Height (cm)
⩾170	4/21	1.0d		22/52	1.0d		75/51	1.0d
169–163	7/32	0.14	0.01–1.68	29/41	1.79	0.78–4.10	77/43	1.43	0.76–2.70
⩽162	29/41	0.24	0.02–3.12	20/34	1.73	0.69–4.33	74/22	1.88	0.91–3.86
P-value for trend		0.932			0.192			0.062
At diagnosis
Weight (kg)
⩾76	12/40	1.0d		25/54	1.0d		38/53	1.0d
66–75	11/31	1.44	0.46–4.49	20/50	0.70	0.28–1.74	56/42	1.67	0.85–3.27
⩽65	24/28	2.28	0.79–6.59	28/21	3.60	1.45–8.94	127/26	4.57	2.29–9.09
P-value for trend		0.096			0.009			<0.001
Body mass index (kg m−2)
⩾26	21/59	1.0d		31/81	1.0d		61/64	1.0d
23–25	11/25	1.12	0.38–3.28	25/28	2.34	1.02–5.35	68/35	1.59	0.84–3.02
⩽22	7/9	3.45	0.85–14.1	15/15	2.89	1.07–7.80	90/16	4.12	1.99–8.51
P-value for trend		0.191			0.011			<0.001
2 years before
Weight (kg)
⩾76	11/40	1.0d		24/59	1.0d		45/50	1.0d
75–66	13/31	1.92	0.64–5.80	24/49	1.12	0.48–2.63	71/46	1.40	0.73–2.69
⩽65	25/32	2.71	0.94–7.85	22/21	2.54	1.02–6.35	112/26	3.51	1.77–6.96
P-value for trend		0.068			0.047			<0.001
Body mass index (kg m−2)
⩾26	20/59	1.0d		34/84	1.0d		75/64	1.0d
25–23	14/24	2.23	0.76–6.40	25/30	1.69	0.78–3.69	67/34	1.31	0.69–2.48
⩽22	5/9	2.38	0.53–10.7	10/11	1.72	0.56–5.30	81/16	4.10	1.97–8.55
P-value for trend		0.134			0.163			<0.001
In young adulthood
Weight (kg)
⩾69	12/32	1.0d		22/54	1.0d		64/49	1.0d
68–61	8/17	1.11	0.27–4.56	23/33	2.15	0.88–5.27	59/41	1.15	0.59–2.24
⩽60	30/55	0.78	0.28–2.18	25/39	1.68	0.69–4.12	100/31	2.57	1.31–5.06
P-value for trend		0.569			0.229			0.007
Body mass index (kg m−2)
⩾25	14/34	1.0d		20/43	1.0d		66/41	1.0d
24–23	7/18	1.26	0.33–4.76	20/39	1.20	0.49–2.94	58/37	1.00	0.51–1.98
⩽22	17/40	0.99	0.37–2.69	29/40	1.34	0.56–3.21	94/33	2.13	1.07–4.24
P-value for trend		0.922			0.514			0.041

^aSome strata do not add up to the total because of a few missing values.

^bEstimates from unconditional regression equations including terms for age, gender, centre, education, drinking habits, fruit and vegetables intake in never smokers.

^cEstimates from unconditional regression equations including terms for age, gender, centre, education, smoking and drinking habits, fruit and vegetables intakes in former and current smokers.

^dReference category.