Table 4.
Differences in Strengths and Difficulties Questionnaire (SDQ) total difficulties score and between preterm- and term-born children divided by perceived income adequacy in two regression models and interaction
| Income adequacy | Term | Preterm | Difference (95 % CI) | Model 1 Adjusted difference (95 % CI) | Model 2 Adjusted difference (95 % CI) | Inter-action Pa | |
|---|---|---|---|---|---|---|---|
| Total SDQ score mother | All | 5.2 ± 4.1 | 6.2 ± 4.7 | 1.0 (0.4, 1.5)* | 0.6 (0.0, 1.1) | 0.5 (0.0, 1.1) | 0.072 |
| Inadequate | 6.9 ± 5.0 | 7.0 ± 4.9 | 0.1 (−1.8, 1.7) | −1.2 (−2.9, 0.5) | −1.4 (−3.0, 0.3) | ||
| Adequate | 6.1 ± 4.4 | 7.3 ± 5.0 | 1.2 (0.0, 2.4) | 0.6 (−0.6, 1.8) | 0.4 (−0.8, 1.6) | ||
| More than adequate | 4.5 ± 3.6 | 5.5 ± 4.4 | 1.0 (0.3, 1.6)* | 0.9 (0.3, 1.6)* | 0.9* (0.3, 1.6) | ||
| Total SDQ score teacher | All | 5.2 ± 4.6 | 5.9 ± 5.0 | 0.7 (−0.1, 1.5) | 0.5 (−0.2, 1.3) | 0.5 (−0.2, 1.2) | 0.631 |
| Inadequate | 6.2 ± 5.3 | 7.2 ± 6.7 | 1.0 (−1.3, 3.3) | 0.2 (−2.1, 2.4) | 0.2 (−2.1, 2.4) | ||
| Adequate | 5.8 ± 5.0 | 5.6 ± 4.2 | −0.2 (−1.8, 1.4) | 0.0 (−1.6, 1.6) | −0.1 (−1.7, 1.5) | ||
| More than adequate | 4.8 ± 4.3 | 5.8 ± 4.9 | 1.0 (0.0, 1.8) | 0.8 (−0.1, 1.7) | 0.8 (−0.1, 1.7) |
SDQ scores are presented as mean ± SD
Model 1 corrected for gender, siblings, one-parent household, Dutch ethnic origin, age of mother, smoking during pregnancy, small for gestational age and DASS21 total score
Model 2 corrected for model 1 + maternal education level
* = significant (P < 0.05)
aInteraction between prematurity and income adequacy