Table 1

Cases and controls adjusted for age and sex for all tumours during the entire period studied

	Cases		Controls
Zones	No.	%	No.	%
T30	141	16.83	164	20.45
T20	70	8.35	69	8.59
T10	88	10.50	60	7.48
Z30	102	12.17	112	13.97
Z20	161	19.21	160	19.95
Z10	144	17.18	125	15.59
ZCI	132	15.75	112	13.97
Total	838	100	802	100
Age
<40	25	3.0	23	2.9
40–59	103	12.3	99	12.3
60–79	539	64.3	511	63.7
⩾80	171	20.4	169	21.1
Sex
Females	304	36.3	284	35.4
Males	534	63.7	518	64.6