Table 2. Prevalence of G6PD deficiency according to gender.

	Severity	Number	Male	Femalea	X2	P value
TH Anuradhapura (Males: nb = 313; 95% CIc: 56.99–64.89) (Females: nb = 705; 95% CIc: 52.20–57.02)	≤10%	28	7 (2.24%)	21 (2.98%)	0.45	0.504
	>10–30%	114	28 (8.95%)	86 (12.20%)	2.31	0.129
	Total	142	35 (11.18%) 95% CIc: 11.25–24.91	107 (15.18%) 95% CIc: 14.78–22.72	2.88	0.089
TH Kurunegala (Males: nb = 313; 95% CIc: 55.82–63.02) (Females: nb = 728; 95% CIc: 53.85–58.25)	≤10%	17	7 (2.24%)	10 (1.37%)	1.01	0.314
	>10–30%	66	18 (5.75%)	48 (6.59%)	0.26	0.609
	Total	83	25 (7.99%) 95% CIc: 7.20–22.96	58 (7.97%) 95% CIc: 10.29–20.99	<0.01	0.991

^aPrevalence of G6PD deficiency was significantly greater among females in Anuradhapura than in Kurunegala (P<0.05).

^bn denotes the number of samples.

^c95% CI denotes the interval within which lies the mean percentage level of G6PD enzyme in the population predicted at a 95% level of confidence.