Table 3.

Crude period-specific IRs and their 95% confidence intervals (CI)

	0 - 18 months			19-36 months
DOG	CASES	IR	CI	CASES	IR	CI
MALIGNANT TUMOURS	550	124	112-138	719	162	147-180
BENIGN TUMOURS	436	98	89-109	804	181	164-201
CAT
MALIGNANT TUMOURS	184	57	52-64	222	69	63-77
BENIGN TUMOURS	29	9	8-10	59	18	17-20