Table 1

Characteristics of the study population (n=5343)

CharacteristicsNumber of contacts (%)
Male sex2830 (53)
Age distribution
 <1 month13 (0.2)
 1 month to <3 months207 (3.9)
 3 months to <6 months310 (5.8)
 6 months to <12 months902 (16.9)
 1 year to <5 years2943 (55.1)
 5 years to <12 years968 (18.1)