Table 1. Age and sex distribution of participants and non-participants.

Age group	Male			Female
	No. registered	No. participated	No. not participated	No. registered	No. participated	No. not participated	P value*
15–24	9324	7506	1818	8728	8159	569	0.009
		(80.5)	(19.5)		(93.5)	(6.5)
25–34	8542	6506	2036	7948	7446	502	0.002
		(76.2)	(23.8)		(93.7)	(6.3)
35–44	6567	5147	1420	6181	5911	270	<0.001
		(78.4)	(21.6)		(95.6)	(4.4)
45–54	4568	3825	743	4839	4645	194	0.32
		(83.7)	(16.3)		(96.0)	(4.0)
55–64	3326	2973	353	3937	3766	171	<0.001
		(89.4)	(10.6)		(95.7)	(4.3)
65+	4079	3806	273	3835	3672	163	<0.001
		(93.3)	(6.7)		(95.7)	(4.3)
Total	36406	29763	6643	35468	33599	1869	<0.001
		(81.8)	(18.2)		(94.7)	(5.3)

(): percentages out of numbers registered.

^*for test of significance between rates of participation between males and females.