Table 2. The distribution of 205 cases of cervical carcinoma and 213 controls with corresponding odds ratios (OR) and 95% confidence intervals (CI) by chewing and smoking habits, weight and height (Chennai, 1998–1999).

	No. Cases	%	No. Controls	%	OR (95% CI)b
Chewing habit
Never	167	81.5	198	93.0	1c
Ever	38	18.5	15	7.0	2.30 (1.00–5.34)
Type of paan
Without tobacco	10	4.9	6	2.8	2.64 (0.71–9.75)
With tobacco	28	13.6	9	4.2	2.13 (0.78–5.86)
No of paan/day
<5	16	7.8	9	4.2	1.42 (0.49–4.14)
⩾5	22	10.7	6	2.8	4.00 (1.20–13.33)
χ21 for trend					5.08; P=0.02
Smoking habit
Never	203	99.0	213	100.0	1c
Ever	2	1.0	0	0.0	∞ (0.28–∞)
Weight (kg)
⩾55	58	28.7	86	40.4	1c
50–54	79	39.1	75	35.2	1.56 (0.84–2.88)
⩽49	65	32.2	52	24.4	1.92 (0.98–3.75)
χ21 for trend					3.72; P=0.06
Height (cm)
⩾155	63	31.2	83	39.0	1c
151–154	59	29.2	66	31.0	1.14 (0.59–2.20)
⩽150	80	39.6	64	30.0	1.69 (0.89–3.23)
χ21 for trend					2.56; P=0.11

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

^bEstimates from unconditional regression equations, including terms for age and area of residence, education, occupation, marital status, age at first marriage, number of pregnancies and husband's extramarital affairs.

^cReference category.