Table 1. Descriptive statistics, parameter estimates for each fixed effect individually, and final model estimates for mathematics score a .
| Estimates for each predictor b individually | Final model c | |||||||
|---|---|---|---|---|---|---|---|---|
| N | % | Estimate | (95% CI) | Sig | Estimate | (95% CI) | Sig | |
| Predictors | ||||||||
| Intercept | 3064.9 | 2555.0–3574.7 | .000 | |||||
| Gifted status | ||||||||
| No | 2811 | 90.4 | -265.8 | -(292.6–239.1) | .000 | -228.0 | -(253.9–202.0) | .000 |
| Yes | 298 | 9.5 | 0 d | . | . | 0 d | . | . |
| Limited English Proficiency | ||||||||
| No | 2408 | 77.5 | 134.9 | 110.4–159.4 | .000 | 126.3 | 103.4–149.2 | .000 |
| Yes | 684 | 22.0 | 0 d | . | . | 0 d | . | . |
| Ethnic group | ||||||||
| Native American | 5 | 0.2 | -30.5 | -228.3–167.3 | .763 | 16.0 | -185.7–217.7 | .876 |
| Asian | 132 | 4.2 | 67.0 | 21.9–112.2 | .004 | 66.9 | 23.9–110.0 | .002 |
| African American | 394 | 12.7 | -201.9 | -(233.8–170.0) | .000 | -155.0 | -(185.4–124.5) | .000 |
| Hispanic | 1824 | 58.7 | -129.7 | -(153.7–105.7) | .000 | -68.0 | -(92.0–44.0) | .000 |
| Caucasian | 754 | 24.3 | 0 d | . | . | 0 d | . | . |
| Mobility | ||||||||
| Moved to a different district between the fall and spring | 232 | 7.5 | -131.7 | -(165.7–97.7) | .000 | -98.1 | -(128.9–67.3) | .000 |
| Moved to a different school between the fall and spring | 118 | 3.8 | -90.7 | -(134.8–46.6) | .000 | -60.6 | -(100.6–20.7) | .003 |
| Stayed the whole year | 2758 | 88.7 | 0 d | . | . | 0 d | . | . |
| Eligibility to free or reduced lunch | ||||||||
| Free lunch | 1696 | 54.6 | -140.5 | -(164.2–116.9) | .000 | -52.9 | -(76.0–29.7) | .000 |
| Reduced lunch | 220 | 7.1 | -89.2 | -(125.2–53.2) | .000 | -37.0 | -(70.5–3.6) | .030 |
| Not eligible | 1193 | 38.4 | 0 d | . | . | 0 d | . | . |
| Gender | ||||||||
| Male | 1597 | 51.4 | -10.2 | -26.7–6.2 | .223 | 1.8 | -13.1–16.6 | .813 |
| Female | 1512 | 48.6 | 0 d | . | . | 0 d | . | . |
| Teacher’s highest degree | ||||||||
| Bachelor’s degree | 105 | 74.5 | -19.3 | -67.6–29.0 | .431 | -31.9 | -(62.5–1.4) | .041 |
| Master’s degree | 36 | 25.5 | 0 d | . | . | 0 d | . | . |
| Mean | ||||||||
| Total days absent | 3108 | 5.9 | -4.0 | -(5.3–2.6) | .000 | - | ||
| Days absent due illness | 3108 | 2.2 | -0.5 | -2.9–2.0 | .722 | - | ||
| Days absent no illness | 3108 | 3.8 | -8.1 | -(10.1–6.1) | .000 | -6.8 | -(8.6–4.9) | .000 |
| Ventilation rate[l/s per person] | 3092 | 3.6 | 19.7 | 11.4–28.0 | .000 | 6.7 | 1.0–12.4 | .022 |
| Indoor T [°C] | 3040 | 22.7 | -32.8 | -(51.6–13.9) | .001 | -13.4 | -(25.9–0.9) | .036 |
a Dependent Variable
b added to the zero-model
c Includes all predictors
d This parameter is set to zero because it is redundant