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Table 5 Models displaying interactions between psychiatric disorder indicators and family income quartiles for boys and girls. Beta coefficients of z-scores of grade points (with upper and lower 95% confidence intervals in parenthesis)

From: Is there a social gradient in how youth with mental disorder perform academically? Findings from a Swedish longitudinal register-based study

  Boys Girls
  Model 1a
Beta (CI)
Model 1b
Beta (CI)
Model 2a
Beta (CI)
Model 2b
Beta (CI)
Family income
 1st quartile –0.32 (–0.33, –0.31) –0.31 (–0.32, –0.30) –0.31 (–0.32, –0.30) –0.30 (–0,31, –0.28)
 2nd quartile –0.26 (–0.27, –0.25) –0.25 (–0.26, –0.24) –0.25 (–0.26, –0.24) –0.24 (–0.25, –0.23)
 3rd quartile –0.18 (–0.19, –0.17) –0.17 (–0.18, –0.16) –0.16 (–0.17, –0.15) –0.15 (–0.16, –0.15)
 4th quartile (Ref.) 0 0 0 0
Psychiatric hospitalisations –0.46 (–0.51, –0.41)   –0.26 (–0.28, –0.23)  
 × 1st quartile 0.13 (0.06, 0.20)   –0.06 (–0.10, –0.02)  
 × 2nd quartile 0.04 (–0.03, 0.10)   –0.13 (–0.17, –0.09)  
 × 3rd quartile –0.02 (–0.10, 0.04)   0.00 (–0.03, 0.04)  
 × 4th quartile (Ref.) 0   0  
Psychoanaleptics prescription   –0.70 (–0,77, –0.73)   –0.55 (–0.57, –0.52)
 × 1st quartile   –0.08 (–0.12, –0.04)   –0.18 (–0.22, –0.14)
 × 2nd quartile   –0.10 (–0.14, –0.06)   –0.12 (–0.15, –0.08)
 × 3rd quartile   –0.05 (–0.09, –0.01)   –0.07 (–0.11, –0.04)
 × 4th quartile (Ref.)   0   0
N 279 853 267 772
  1. Confidence intervals that do not include 0 indicate that estimates are statistically significant at the 5 % level (p < 0.05). Model 1a-1b displays the results for boys, model 2a-2b for girls. Models adjusted for all covariates