Table 2.
Multivariable logistic regression model for the association between receipt of medication for attention-deficit hyperactivity disorder and the Index of Multiple Deprivation, controlling for patient's age, gender, care centre, ethnic group, religion and comorbid conditions (n = 1197)
| Variable | Effect measure | P |
|---|---|---|
| IMD decile, per decile increase, aOR (95% CI) | 0.90 (0.84–0.97) | 0.003 |
| Age, per year increase, aOR (95% CI) | ||
| Age spline 1 | 1.19 (1.04–1.36) | 0.012 |
| Age spline 2 | 0.85 (0.72–1.01) | 0.066 |
| Female gender, aOR (95% CI) | 0.85 (0.50–1.44) | 0.537 |
| Care centre, aOR (95% CI) | ||
| Ryegate Children's Centre | 1.00 | − |
| CAMHS 1 | 1.61 (0.77–3.37) | 0.208 |
| CAMHS 2 | 1.63 (0.89–3.00) | 0.115 |
| Ethnic group, aOR (95% CI) | ||
| Other | 1.00 | − |
| White British | 1.77 (0.98–3.20) | 0.057 |
| Not stated | 2.04 (0.38–10.83) | 0.405 |
| Religion, aOR (95% CI) | ||
| No religion | 1.00 | |
| Christian | 1.00 (0.63–1.58) | 0.999 |
| Other religion | 1.19 (0.42–3.35) | 0.738 |
| Not stated | 2.00 (0.49–8.07) | 0.332 |
| Comorbid conditions, aOR (95% CI) | ||
| Autism spectrum disorder | 1.79 (1.00–3.18) | 0.050 |
| Intellectual difficulties | 1.33 (0.59 – 3.00) | 0.494 |
| Other comorbidity | 1.41 (0.90–2.21) | 0.139 |
| Model performance statistics | ||
| Calibration slope (95% CI) | 0.91 (0.50–1.32) | |
| HL goodness-of-fit, χ2 (d.f.) | 8.68 (8) | 0.370 |
| C-statistic (95% CI) | 0.66 (0.60–0.72) | |
| C-statistic, BOC | 0.63 |
IMD, Index of Multiple Deprivation; aOR, adjusted odds ratio; CAMHS, Child and Adolescent Mental Health Services; HL, Hosmer–Lemeshow; d.f., degrees of freedom; BOC, bootstrap optimism corrected. Age was modelled using restricted cubic splines with slopes defined at quartiles (11.3, 13.6 and 16.0 years).