Table 1

Participant characteristics

Initial interviewsTotalFollow-up interviewsTotalLost to follow-upTotal
MenWomenMenWomenMenWomen
Age group, years
 18–19224123101
 20–2410313729314
 25–341151610515101
 35–39213000213
 40–44123123000
 45–49011000011
 50+112011101
 Total2715421912318311
Marital status
 Married5813369224
 Single2062615520516
 Widowed000000000
 Divorced213112101
Educational level*
 Primary066055011
 Secondary116179514213
 Tertiary112138210303
Employed
 Yes2242616420606
 No21012189123
 Student314202112
Symptomatic
 Yes459336123
 No23103316925718
  • * Not available for all.