Visits→ | Visit 1 | Visit 2 | Visit 3 | Visit 4 |
---|---|---|---|---|
Variables | Mean (SD) [range] | Mean (SD) [range] | Mean (SD) [range] | Mean (SD) [range] |
Chronological age | 12 (1.5) [10–16] | 13 (1.5) [11–17] | 14 (1.5) [12–18] | 15 (1.5) [13–19] |
Biological predictors | ||||
 Ratio of affected to total chromosomes | 56.47 (19.92) [27–88] |  |  |  |
 Level of FMRP expression | 0.48 (0.05) [0.34–0.51] |  |  |  |
Maternal predictors | ||||
 Maternal psychological distress | 51.5 (11.6) [30–65] |  |  |  |
 Closeness in the mother–child relationship | 23.5 (4.1) [16–28] |  |  |  |
Dependent variables | ||||
 Fluid intelligence (SS) | 68 (13.6) [48–90] | 70.3 (15.5) [48–100] | 62.9 (12.6) [48–88] | 66.5 (15.2) [48–102] |
 Fluid intelligence (RS) | 33.9 (12.8) [17–55] | 38.9 (11.6) [18–58] | 37.4 (13.3) [17–61] | 39.8 (13.1) [20–61] |
 Crystallized intelligence (SS) | 81.2 (17.6) [51–107] | 84 (16.3) [57–112] | 81.3 (15.7) [52–100] | 82.7 (20.9) [41–109] |
 Crystallized intelligence (RS) | 87.8 (19.8) [53–120] | 95.9 (20.3) [64–132] | 96.6 (20.2) [62–135] | 103.8 (25) [62–148] |
 Anxious behaviors (TS) | 59.53 (10.01) [50–84] | 60 (7.7) [50–72] | 60.1 (8.2) [50–74] | 58.2 (7.2) [50–70] |
 Withdrawn behaviors (TS) | 62.5 (11.6) [50–87] | 59.8 (9.4) [50–81] | 64.4 (10.7) [50–81] | 62 (11.8) [50–85] |