Table 5. Cox Regressions comparing Maternal Sensitivity and Linguistic Stimulation.
| Oral Language | Symbolic Play | Noun Class | ||||
|---|---|---|---|---|---|---|
| Estimate (SE) | HR | Estimate (SE) | HR | Estimate (SE) | HR | |
| Contrasts | ||||||
| Hearing controls | 2.43 (0.26)* | 11.33 (6.75 to 19.01) | 0.40 (0.22) | 1.48 (0.97 to 2.28) | 1.74 (0.29)* | 5.67 (3.23 to 9.97) |
| High Maternal Sensitivity and High Linguistic Stimulation | Reference Category | – | Reference Category | – | Reference Category | – |
| Either Low Maternal Sensitivity or Low Linguistic Stimulation | -0.64 (0.21)* | 0.53 (0.35 to 0.80) | 0.02 (0.22) | 1.02 (0.67 to 1.56) | -0.37 (0.20) | 0.69 (0.47 to 1.03) |
| Control Variables | ||||||
| Maternal Education (years) | 0.25 (0.05)* | 1.28 (1.16 to 1.41) | 0.09 (0.05) | 1.09 (0.99 to 1.05) | 0.15 (0.06)* | 1.16 (1.03 to 1.31) |
| Child’s Age at Enrollment (years) | -0.76 (0.08)* | 0.47 (0.40 to 0.55) | -0.65 (0.12)* | 0.52 (0.42 to 0.66) | -0.80 (0.09)* | 0.45 (0.38 to 0.53) |
| Child’s Gender (0 = Male; 1 = Female | 0.03 (0.14) | 1.03 (0.78 to 1.36) | 0.58 (0.17)* | 1.79 (1.27 to 2.51) | 0.43 (0.19)* | 1.54 (1.06 to 2.26) |
| Child’s IQ (in standard deviation units) | 0.16 (0.06)* | 1.16 (1.04 to 1.33) | -0.06 (0.06) | 0.94 (0.84 to 1.06) | 0.17 (0.06)* | 1.19 (1.06 to 1.34) |
SE = Standard Error; HR = Hazard Ratio.
* p < .05.