Table 1.

Distribution of the study group by age.

	With Switch		Without Switch		p
Age (Years)	n (148)	%	n (1562)	%
20–29	20	13.5	260	16.6	p < 0.00001
30–39	85	57.4	473	30.3
40–49	19	12.8	387	24.8
50–59	17	11.5	344	22.0
Over 60	7	4.8	98	6.3