Table 3.
Subgroup analysis by number of WelTel text message replies during the study year.
| Outcome Variable | n | Incident rate ratio (95% CI) | P | |
| Gendera | ||||
| Male | 6 | Reference | ||
| Female | 72 | 1.00 (0.45-1.94) | .99 | |
| Age (years) | 80 | 1.00 (0.99-1.02) | .91 | |
| Ethnicity | ||||
| Caucasian | 30 | Reference | ||
| First Nations | 27 | 1.32 (0.84-2.07) | ||
| African Canadian | 18 | 1.28 (0.78-2.14) | ||
| South Asian | 5 | 1.50 (0.71-3.68) | .56 | |
| Income source | ||||
| Disability | 57 | Reference | ||
| Other | 23 | 1.18 (0.78-1.81) | .44 | |
| Long-distance call | ||||
| Yes | 15 | Reference | ||
| No | 64 | 0.82 (0.49-1.31) | .42 | |
| Geographic distance | ||||
| ≤50 km | 58 | Reference | ||
| >50 km | 20 | 0.85 (0.56-1.32) | .47 | |
| Substance use | ||||
| None | 28 | Reference | ||
| Alcohol or illicit drug use | 47 | 0.75 (0.50-1.11) | .15 | |
| Mean control year log10 VL | 80 | 0.94 (0.78-1.14) | .54 | |
a The two transgender participants were excluded from this comparison.