Table 2.
Achievement test scores for the combined group (n=645)
| Subjects | Combined (n=645) Mean±D (95% CI) | Girls (n=348) Mean±SD 95% CI) | Boys (n=297) Mean±SD (95% CI) | Mean difference | p value for the difference |
|---|---|---|---|---|---|
| ELA | 21.9±16.3(20.6, 23.1) | 22.5±16.1 (20.8, 24.2) | 21.1±16.5 (19.2, 23.0) | 1.4 | 0.27 |
| MA | 12.5±7.8 (11.9, 13.1) | 11.4±7.3 (10.6, 12.1) | 13.9±8.2 (13.0, 14.8) | −2.5 | <0.001 |
| LSA | 27.9±14.4 (26.8, 29.0) | 27.0±14.4 (25.5, 28.5) | 29.0±14.3 (27.3, 30.6) | −1.9 | 0.09 |
| ORA | 37.7±21.0 (36.0, 39.3) | 38.1±20.7 (35.9, 40.3) | 37.1±21.4 (34.7, 39.6) | 1.0 | 0.56 |
| Grand mean | 254.0±11.8 (24.1, 25.9) | 24.8±11.4 (23.6, 26.0) | 25.3±12.2 (23.9, 26.7) | −0.5 | 0.58 |
| Grand total score | 100.0±47.1 (96.3, 103.6) | 99.0±45.6 (94.2, 103.8) | 101.1±48.8 (95.5, 106.6) | −2.1 | 0.58 |
Note: Scores are presented as means±SD, with 95% confidence intervals in parentheses.