Table I.
Characteristics of included studies – decoding
| Study | n | Mean gestational age, wk (SD) |
Mean birth weight, g (SD) |
Mean age, y:mo (SD, mo) |
Assessment (task) | Mean score (SD) |
|---|---|---|---|---|---|---|
| Anderson and Doyle71 | 259 PT | 26.7 (1.9) | 884 (162) | 8:8 (4) | WRAT-3 (Reading) | 96.6 (16.0) |
| 219 T | 39.3 (1.4) | 3407 (443) | 8:11 (5) | 103.3 (14.7)* | ||
| Hutchinson et al.72 | 189 PT | 26.5 (2.0) | 833 (164) | 8:6 (5) | WRAT-3 (Reading) | 98 (16.1) |
| 173 T | 39.3 (1.1) | 3506 (1455) | 8:6 (5) | 105.5 (13.8)* | ||
| Johnson et al.73 | 199 PT | ≤25 | 740 (660,840)a | 10:11 (5) | WIAT-II-UK (Word Reading) | 86.3 (17.3) |
| 153 T | N/A | N/A | 10:11 (7) | 99.6 (12.1)* | ||
| Kesler et al.45 | 73 PT | 28.3 (1.9) | 966 (168) | 9:2 (8) | PIAT-R (Reading Recognition) | 97 (19) |
| 20 T | N/A | N/A | 8:6 (8) | 101 (15) | ||
| Rose et al.74 | 44 PT | 29.7 (2.8) | 1165.2 (268.4) | 11:2 (5) | WJ-III (Letter-Word ID) | 98.0 (14.5) |
| 86 T | 38–42 | >2500 | 11:1 (5) | 100.6 (9.8) | ||
| Short et al.67 | 173 PT | 30 (2) | 1256 (176) | 8 | WJ-R (Letter-Word ID) | 94.7 (15.4)b |
| 99 T | 40 (1) | 3451 (547) | 8 | 102.6 (18.0)* | ||
| Taylor et al.68 | 155 PT | 30 (2.2)b | 1127 (148)b | 8 | WJ-R COG (Word ID) | 99.3 (20.8) |
| 83 T | 40 (0.4) | 3229 (677) | 8 | 101.2 (16.0) | ||
| Taylor et al.75 | 204 PT | 26.4 (2) | 810 (124) | 8:8 (7) | WJ-III (Letter-Word ID) | 88.6 (17.7) |
| 176 T | >36 | 3300 (513) | 9:2 (10) | 95.7 (13.7)* | ||
| Taylor et al.44 | 142 PT | 25.9 (1.6) | 818 (174) | 6:0 (5) | WJ-III (Letter-Word ID) | 106.1 (13.5) |
| 111 T | >36 | 3382 (446) | 6:0 (4) | 110.1 (13.5)* |
N/A indicates information not available.
*
Significant difference between PT and T groups (p<0.05).
a
Median (interquartile range).
b
Mean and SD are weighted.
PT, preterm children; T, term-born children; WRAT-3, Wide Range Achievement Test (third edition); WIAT-II-UK, Wechsler Individual Achievement Test (second edition); PIAT-R, Peabody Individual Achievement Test (revised); WJ-III, Woodcock–Johnson III Tests of Achievement; WJ-R, Woodcock–Johnson Tests of Achievement (revised); WJ-R COG, Woodcock–Johnson Tests of Cognitive Ability (revised).