Table 3 The group trajectories at day 1, 45 and 90
|  | Group | Attempt probability 1−ν | Mean time μ (h) | SD time σ (h) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Â | Â | Day 1 | Day 45 | Day 90 | Day 1 | Day 45 | Day 90 | Day 1 | Day 45 | Day 90 |
A | Variable users | 99% | 98% | 96% | 7.1 | 6.7 | 6.5 | 1.7 | 1.8 | 1.9 |
B | Consistent users | 98% | 99% | 98% | 7.4 | 7.3 | 7.3 | .90 | .84 | .90 |
C | Good users | 98% | 99% | 99% | 7.1 | 7.0 | 7.0 | 1.3 | 1.2 | 1.3 |
D | Stable decliners | 93% | 87% | 78% | 6.3 | 5.9 | 5.8 | 1.3 | 1.4 | 1.5 |
E | Strugglers | 79% | 59% | 77% | 5.3 | 5.1 | 5.6 | 1.9 | 1.8 | 1.9 |
F | Improvers | 88% | 93% | 97% | 5.2 | 6.4 | 6.8 | 2.2 | 1.7 | 1.6 |
G | Variable decliners | 95% | 90% | 80% | 6.6 | 6.0 | 5.8 | 2.3 | 2.4 | 2.6 |
H | Dropouts | 91% | 65% | 15% | 5.6 | 4.9 | 4.3 | 2.0 | 1.8 | 2.2 |
I | Early dropouts | 75% | 11% | 17% | 5.0 | 3.9 | 4.8 | 1.8 | 1.8 | 2.0 |