Table 1 Characteristics of the study population (N = 10,929)
Characteristics | Mean (SD) or P50 (P25– P75) | n (%) |
|---|---|---|
Age at start (years) | 9.7 (3.4) | |
Gender | ||
Boys | 6353 (58%) | |
Girls | 4576 (42%) | |
Number of transmissions in first 3 months 0 ≥ 1 | 6042 (55%) 4887 (45%) | |
Adherence in first 3 months (%) | 99 (94–100) | |
Needle speed in first 3 months | ||
Slow | 384 (4%) | |
Medium | 5268 (48%) | |
Fast | 5277 (48%) | |
Injection time in first 3 months (seconds) | 8 (5–10) | |
Injection depth in first 3 months | ||
4 mm | 1424 (13%) | |
6 mm | 6895 (63%) | |
8 mm | 2248 (21%) | |
10 mm | 362 (3%) | |
Number of dose changes in first 3 months 0 ≥ 1 | 8447 (23%) 2482 (77%) | |
Adherence < 85% 3 months | 1964 (18%) | |
Adherence < 85% 6 months | 2194 (20%) | |
Adherence < 85% 9 months | 2419 (22%) |