TABLE 2—
Continuous Variables in Postclustering Comparisons of Male and Female Injection Drug Users: Winnipeg, Manitoba, 2003–2004
| Male Participants | Female Participants | |||||
| Variable and Cluster | Mean (SD) | b (95% CI) | P | Mean (SD) | b (95% CI) | P |
| Age, y | .723 | <.001 | ||||
| 1 (Ref) | 34.7 (9.0) | . . . | 32.9 (9.0) | . . . | ||
| 2 | 36.6 (8.9) | 1.89 (−4.10, 7.87) | 34.9 (8.2) | 1.98 (−2.82, 6.77) | ||
| 3 | 35.4 (13.1) | 0.69 (−4.28, 5.67) | 21.9 (5.9) | −11.00*** (−5.63, −16.37) | ||
| 4 | 35.1 (9.7) | 0.35 (−4.45, 5.14) | 38.3 (8.9) | 5.36* (1.12, 9.60) | ||
| 5 | 35.6 (10.9) | 0.91 (−3.82, 5.64) | 32.0 (9.7) | −0.94 (−6.71, 4.84) | ||
| 6 | 39.0 (8.4) | 4.28 (−1.01, 9.56) | 34.6 (9.9) | 1.64 (−3.44, 6.72) | ||
| 7 | 35.2 (8.7) | 0.48 (−4.53, 5.48) | 34.9 (9.3) | 1.93 (−2.25, 6.12) | ||
| Total | 35.8 (10.1) | 33.8 (9.7) | ||||
| Length of time since first injection, y | .877 | <.001 | ||||
| 1 (Ref) | 14.3 (9.2) | . . . | 11.9 (8.0) | . . . | ||
| 2 | 15.3 (8.8) | 0.99 (−5.25, 7.23) | 14 (8.7) | 2.13 (−2.48, 6.73) | ||
| 3 | 14.5 (13.1) | 0.16 (−5.03, 5.34) | 3.0 (2.9) | −8.88*** (−3.72 , −14.03) | ||
| 4 | 16.7 (10.1) | 2.33 (−2.67, 7.32) | 13.9 (10.3) | 2.04 (−2.02, 6.11) | ||
| 5 | 15.3 (11.3) | 0.96 (−3.97, 5.89) | 13.3 (11.6) | 1.43 (−4.11, 6.97) | ||
| 6 | 16.2 (9.1) | 1.83 (−3.67, 7.34) | 13.5 (7.8) | 1.60 (−3.28, 6.48) | ||
| 7 | 13.4 (9.8) | −0.92 (−6.14, 4.30) | 15.1 (7.7) | 3.20 (−0.82, 7.22) | ||
| Total | 15.1 (10.5) | 12.7 (9.0) | ||||
Note. CI = confidence interval. Age at first injection was not significant at the P < .05 level and is not included here.
*P < .05; ***P < .001.