Table 1.

Baseline characteristics of the study participants.

Characteristics	Participants (n = 4147)
Age, years
20-29	1461 (35.2%)
30-39	1245 (30.0%)
40-49	776 (18.7%)
50-59	424 (10.2%)
60-69	193 (4.7%)
70-	48 (1.2%)
Sex
Male	1498 (36.1%)
Female	2649 (63.9%)

Data are presented as n or n (%).