Table 2 Descriptives and chi-squares comparing prekindergarten treatment participants to matched nonparticipants on reading and math tests
Grade (n) | Assessment | Prekindergarten treatment group | Matched comparison group | χ2 (1) | p* | Odds ratio (95% CI lower and upper bound) |
|---|---|---|---|---|---|---|
Mean (SD) | Mean (SD) | |||||
3rd (n = 878) | Reading | 56.5% (0.50) | 45.9% (0.50) | 19.29 | < 0.001* | 1.53 (1.26, 1.86) |
3rd (n = 878) | Math | 58.3% (0.49) | 47.4% (0.50) | 20.62 |  < 0.001* | 1.55 (1.28, 1.88) |
6th (n = 804) | Reading | 43.5% (0.50) | 30.7% (0.46) | 27.72 | < 0.001* | 1.74 (1.41, 2.14) |
6th (n = 804) | Math | 39.9% (0.49) | 27.6% (0.45) | 26.70 | < 0.001* | 1.74 (1.41, 2.16) |
8th (n = 723) | Reading | 23.4% (0.42) | 14.0% (0.35) | 20.44 | < 0.001* | 1.88 (1.42, 2.49) |
8th (n = 723) | Math | 16.2% (0.37) | 11.1% (0.31) | 7.62 | 0.006* | 1.55 (1.13, 2.13) |
11th (n = 525) | Reading | 36.2% (0.48) | 28.8% (0.45) | 6.27 | 0.012 | 1.40 (1.07, 1.84) |
11th (n = 525) | Math | 4.95% (0.22) | 5.9% (0.24) | 0.30 | 0.586 | 0.83 (0.47, 1.47) |