Table 1.
Subject demographics and mean tract‐FA measures
| Behavioral measures | Preterm (n = 26) | Full term (n = 19) | t or X 2 |
|---|---|---|---|
| Boys, n (%) | 13 (50) | 9 (47.3) | 0.03 |
| Low maternal education, n (%) | 3 (11.5) | 6 (31.5) | 2.76 |
| Mean age in years (stdev) | 12.80 (2.3) | 12.9 (2.2) | 0.149 |
| Mean gestational age in weeks (stdev) | 28.2 (2.2) | 39.2 (1.1) | 21.6a |
| Mean birth weight in grams (stdev) | 1159.1 (427.4) | 3153.9 (407.0) | 15.9a |
| WJ‐III Basic reading skills cluster, SS (stdev) | 105.3 (13.4) | 106.7 (10.0) | 0.402 |
| WJ‐III Passage comprehension, SS (stdev) | 102.5 (12.7) | 108.1 (14.0) | 1.4 |
| Performance IQ, WASI, SS | 106.2 (14.5) | 107.3 (12.9) | 0.261 |
| Mean tract‐FA | F = 1.92 | ||
| SCP‐L, mean FA (stdev) | 0.34 (0.03) | 0.33 (0.05) | |
| SCP‐R, mean FA (stdev) | 0.34 (0.04) | 0.32 (0.04) | |
| MCP, mean FA (stdev) | 0.50 (0.06) | 0.48 (0.04) | |
| ICP‐L, mean FA (stdev) | 0.46 (0.04) | 0.44 (0.04) | |
| ICP‐R, mean FA (stdev) | 0.45 (0.05) | 0.45 (0.04) |
a
P < 0.05
stdev = standard deviation; SS = standard score; WJ‐III = Woodcock–Johnson Tests of Achievement, 3rd edition; WASI = Wechsler Abbreviated Scale of Intelligence; SCP = superior cerebellar peduncle; MCP = middle cerebellar peduncle; ICP = inferior cerebellar peduncle; FA = fractional anisotropy (mean calculated across the tract); L = left; R = right.