Table 2.

Age distribution of participants

Age range	N	Percent
30–40 years	141	48.8
41–50 years	58	20.1
51–60 years	60	20.8
61–70 years	22	7.6
71 years or older	5	1.7
Total	286a	99.0a

^aThree of 289 participants (1%) did not provide the age range