Table 2 Comparison between cystinosis and CKD groups regarding Stanford-Binet test (SB)
|  | Cystinosis group (n = 20) | CKD group (n = 26) | T-test/chi-square (t/χ2) value | p-value |
|---|---|---|---|---|
IQ | 81.25 ± 15.9 | 83.77 ± 15.5 | t = 0.283 | 0.592 |
 Average | 7 (35%) | 11 (42.3%) | χ2 = 1.242 | 0.209 |
 Below average | 3 (15%) | 6 (23.1%) | ||
 Mild MR | 5 (25%) | 5 (19.2%) | ||
 Slow learning | 5 (25%) | 4 (15.4%) | ||
Verbal reasoning | 82.85 ± 13.7 | 83.84 ± 10.2 | t = 0.189 | 0.787 |
Visual reasoning | 88.45 ± 11.6 | 92.04 ± 12.3 | t = 1.057 | 0.319 |
Short-term memory | 82.30 ± 14.8 | 82.58 ± 14.9 | t = 0.067 | 0.950 |