Table 1. Age distribution by groups.

Age in years	Group A		Group B		Total
	No.	%	No.	%	No.	%
0-9	3	7.3	1	1.8	4	4.1
10-19	3	7.3	2	3.6	5	5.2
20-29	6	14.6	4	7.1	10	10.3
30-39	9	22	7	12.5	16	16.5
40-49	13	31.7	19	33.9	32	33.0
50+	7	17.1	23	41.1	30	30.9
Total	41	100	56	100.0	97	100.0
Xmax	58	-	59	-	59	-
Xmin	5	-	8	-	5	-
Xb	36.4	-	45.1	-	41.2	-
SD	15.1	-	11.3	-	13.7	-
VC	41.4	-	25.0	-	33.2	-
T test=3.24; DF=95; P=0.0016*