Skip to main content
. 2017 Jun 20;51:60. doi: 10.1590/S1518-8787.2017051006681

Table 1. Follow-up periods, losses to follow-up, and attrition rates per 100 person-years. Project Horizonte, 1994–2011.

Follow-up (years) Person-time Losses to follow-up (n) Attrition rate (100 person-years) 95%CI
0 ┤1 1,016.85 233 22.91 20.15–26.05
1 ┤2 775.24 104 13.42 11.07–16.26
2 ┤3 609.35 74 12.14 9.67–15.25
3 ┤4 490.38 38 7.75 5.64–10.64
4 ┤5 405.50 30 7.40 5.18–10.58
5 ┤6 342.02 26 7.60 5.18–11.16
6 ┤7 276.38 17 6.15 3.82–9.89
7 ┤8 226.93 11 4.85 2.68–8.75
8 ┤9 185.94 16 8.60 5.27–14.04
9 ┤10 146.49 11 7.51 4.16–13.56
> 10 446.69 11 2.46 1.36–4.45

Total 4,921.77 571 11.60 10.69–12.59