Table 1.

Distribution of study population by age.

Age groups (years)	Cases (no.)	Controls (no.)	OR	95% CI	P value
<19	41	10	4.90	2.38–10.09	<0.001
20–29	90	102	1.00	-	-
30–34	37	48	0.72	0.45–1.17	NS
35–39	18	30	0.56	0.30–1.04	NS
≥40	14	10	1.43	0.62–3.30	NS
all ages	200	200	-	-	-