Table 1.
Age, years of education of parents, and scores of WISC of six cluster subtypes. Average values are given with standard deviations in parentheses for age, years of education, and four WISC scores. Statistical threshold was set at P < 0.05 with Bonferroni correction.
| Cluster | 1 | 2 | 3 | 4 | 5 | 6 | Statistical significance | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n | 64 | 39 | 31 | 52 | 50 | 41 | |||||||
| Age | 11.9 | (2.7) | 10.2 | (2.8) | 11.2 | (2.9) | 10.7 | (2.8) | 10.0 | (3.1) | 12.0 | (3) | 1 > 5, 6 > 5 |
| Years of education (father) | 14.7 | (2.5) | 14.9 | (2) | 14.7 | (1.7) | 14.7 | (2.2) | 14.5 | (2.1) | 14.6 | (2.3) | n.s. |
| Years of education (mother) | 13.8 | (1.8) | 13.9 | (1.4) | 14.1 | (1.6) | 14.1 | (2) | 13.7 | (1.7) | 13.4 | (1.4) | n.s. |
| Scores of WISC | |||||||||||||
| FSIQ | 105.3 | (5.3) | 112.4 | (7.9) | 86.3 | (6.6) | 116.8 | (7.8) | 95.0 | (6.3) | 93.9 | (6.3) | |
| VIQ | 108.2 | (6.4) | 105.5 | (9.8) | 89.5 | (6.9) | 121.2 | (8.9) | 95.7 | (9.2) | 94.2 | (8.3) | 4 > 1 = 2 > 5 = 6 = 3 |
| PIQ | 100.9 | (6.8) | 117.4 | (8) | 85.3 | (10.7) | 108.6 | (9.2) | 95.1 | (8.5) | 94.3 | (7.3) | 2 > 4 > 1 > 5 = 6 > 3 |
| VC | 110.6 | (7.5) | 104.3 | (11.1) | 89.9 | (8.7) | 120.6 | (10.5) | 92.4 | (9.5) | 95.7 | (8.8) | 4 > 1 > 2 > 3 = 6 = 5 |
| PO | 102.6 | (8.6) | 117.4 | (10.3) | 88.1 | (11.2) | 109.7 | (9.8) | 94.9 | (9.5) | 90.3 | (8.8) | 2 > 4 > 1 > 5 > 3, 5 = 6, 3 = 6 |
| FD | 93.8 | (7.7) | 103.1 | (8.7) | 87.6 | (7.8) | 115.2 | (8.8) | 106.2 | (8.7) | 88.0 | (8.4) | 4 > 2 > 5 > 1 > 6 = 3 |
| PS | 97 | (8) | 114.8 | (9.6) | 84.0 | (7.4) | 105.0 | (11) | 99.7 | (9) | 111.4 | (8.2) | 2 = 6 > 4 > 1 = 5 > 3 |
FIQ, full scale IQ; VIQ, verbal IQ; PIQ, performance IQ; VC, verbal comprehension; PO, perceptual organization; FD: freedom from distractibility; PS, processing speed. “ = ” means no significant among subtypes.