Table I.
Final Trajectory Models
| Group (%) | Parameter | Estimate (95% CI) | t | p |
|---|---|---|---|---|
| PedsQL™ physical | ||||
| Superior-stable (45.6) | Intercept | 98.3 (94.6 to 102.0) | 52.84 | <.001 |
| Time | 0.83 (0.09 to 1.57) | 2.22 | .03 | |
| High-stable (34.5) | Intercept | 86.5 (81.6 to 91.4) | 34.58 | <.001 |
| Time | −0.63 (−1.47 to 0.21) | −1.48 | .14 | |
| Poor-increasing (19.9) | Intercept | 62.9 (56.0 to 69.8) | 18.01 | <.001 |
| Time | −3.58 (−7.15 to −0.01) | −1.97 | .049 | |
| Time2 | 0.559 (0.165 to 0.953) | 2.78 | .006 | |
| PedsQL™ emotional | ||||
| Superior-stable (23.8) | Intercept | 99.5 (93.6 to 105.4) | 33.01 | <.001 |
| Time | 0.74 (−0.32 to 1.80) | 1.37 | .17 | |
| High-stable (29.1) | Intercept | 79.7 (74.2 to 85.2) | 28.59 | <.001 |
| Time | 1.60 (0.72 to 2.48) | 3.59 | <.001 | |
| Moderate-stable (31.0) | Intercept | 66.7 (61.4 to 72.0) | 25.02 | <.001 |
| Time | 0.83 (−0.01 to 1.67) | 1.94 | .053 | |
| Poor-stable (16.1) | Intercept | 50.0 (43.7 to 56.3) | 15.88 | <.001 |
| Time | 1.22 (−0.07 to 2.51) | 1.85 | .065 | |
| PedsQL™ social | ||||
| Superior-stable (54.9) | Intercept | 97.1 (93.0 to 101.2) | 46.95 | <.001 |
| Time | 0.66 (−0.14 to 1.46) | 1.61 | .11 | |
| Moderate-stable (45.1) | Intercept | 69.4 (65.3 to 73.5) | 33.05 | <.001 |
| Time | −0.29 (−1.09 to 0.51) | −0.71 | .48 | |
| PedsQL™ school | ||||
| Moderate quickly increasing to superior (9.8) | Intercept | 72.1 (58.4 to 85.8) | 10.35 | <.001 |
| Time | 13.98 (6.73 to 21.23) | 3.78 | <.001 | |
| Time2 | −1.300 (−2.027 to −0.573) | −3.50 | <.001 | |
| Moderate slowly increasing to superior (12.6) | Intercept | 66.8 (55.5 to 78.1) | 11.63 | <.001 |
| Time | −0.45 (−6.51 to 5.61) | −0.15 | .88 | |
| Time2 | 0.476 (−0.232 to 1.184) | 1.32 | .19 | |
| Superior decreasing to high (24.7) | Intercept | 97.1 (84.6 to 109.6) | 15.25 | <.001 |
| Time | −3.05 (−7.28 to 1.18) | −1.41 | .16 | |
| Time2 | 0.078 (−0.349 to 0.505) | 0.36 | .72 | |
| At risk-stable (43.7) | Intercept | 64.2 (58.4 to 70.0) | 21.73 | <.001 |
| Time | −0.41 (−2.92 to 2.10) | −0.32 | .75 | |
| Time2 | 0.040 (−0.227 to 0.307) | 0.29 | .77 | |
| Extremely poor-stable (9.2) | Intercept | 35.8 (26.5 to 45.1) | 7.54 | <.001 |
| Time | 2.77 (−1.86 to 7.40) | 1.17 | .24 | |
| Time2 | −0.248 (−0.754 to 0.258) | −0.96 | .34 | |
| PedsQL™ overall | ||||
| Superior-stable (22.5) | Intercept | 60.1 (57.1 to 63.1) | 39.40 | <.001 |
| Time | 0.14 (−0.47 to 0.75) | 0.45 | .66 | |
| High-stable (35.3) | Intercept | 76.6 (73.8 to 79.4) | 54.48 | <.001 |
| Time | 0.17 (−0.32 to 0.66) | 0.68 | .50 | |
| At risk-stable (42.1) | Intercept | 89.3 (86.9 to 91.7) | 74.2 | <.001 |
| Time | 0.36 (−0.07 to 0.79) | 1.67 | .095 | |