community number: 1-20
treatment arm: 0=control, 1=intervention
stratum: 1-3
ethnic group: 0=non-sukuma, 1=sukuma
lifetime partners at baseline: 0=0, 1=1, 2=2, 3=3+
age-group at follow-up: 1=16-17, 2=18, 3=19+
good knowledge of HIV acquisition at follow-up: 0=no, 1=yes
individual number