Table 3 Age-stratified adjusted incidence rate ratios for the three service types, MCAD deficiency cohort versus screen negative comparison cohort
| Â | Adjusted incidence rate ratio (95% CI) | |||||
|---|---|---|---|---|---|---|
< 1 year of age | ≥1 year of age | |||||
Physician visits | ED visits | Hospitalizations | Physician visits | ED visits | Hospitalizations | |
Cohort | ||||||
 MCAD deficiency | 1.39 (1.18–1.65) | 2.41 (1.59–3.73) | 2.87 (1.41–5.56) | 1.51 (1.22–1.88) | 1.98 (1.39–2.89) | 12.97 (6.96–26.52) |
 Screen negative | Reference | Reference | Reference | Reference | Reference | Reference |
Sex | ||||||
 Female | 0.92 (0.91–0.92) | 0.86 (0.85–0.86) | 0.76 (0.75–0.77) | 0.91 (0.91–0.92) | 0.86 (0.85–0.87) | 0.78 (0.77–0.80) |
 Male | Reference | Reference | Reference | Reference | Reference | Reference |
Season of birth | ||||||
 Jan. – Apr. | Reference | Reference | Reference | Reference | Reference | Reference |
 May – Aug. | 1.01 (1.00–1.01) | 1.04 (1.03–1.05) | 0.98 (0.96–1.00) | 0.96 (0.95–0.96) | 0.95 (0.95–0.96) | 0.94 (0.92–0.97) |
 Sept. – Dec. | 1.00 (0.99–1.00) | 1.02 (1.00–1.03) | 1.08 (1.06–1.11) | 1.00 (0.99–1.00) | 1.00 (0.99–1.01) | 1.03 (1.00–1.05) |
Birth weight | ||||||
  < 2500 g | 1.75 (1.74–1.77) | 1.04 (1.02–1.06) | 2.14 (2.08–2.21) | 1.13 (1.12–1.14) | 1.03 (1.01–1.05) | 1.59 (1.51–1.66) |
  ≥ 2500 g | Reference | Reference | Reference | Reference | Reference | Reference |
Gestational age | ||||||
  < 37 weeks | 1.57 (1.56–1.58) | 1.23 (1.21–1.26) | 2.65 (2.57–2.73) | 1.09 (1.09–1.10) | 1.17 (1.15–1.19) | 1.42 (1.36–1.48) |
  ≥ 37 weeks | Reference | Reference | Reference | Reference | Reference | Reference |
Socioeconomic status | ||||||
  ‘Lower’ | 1.00 (1.00–1.00) | 1.23 (1.22–1.24) | 1.09 (1.07–1.11) | 0.96 (0.96–0.97) | 1.12 (1.11–1.13) | 1.10 (1.08–1.13) |
  ‘Higher’ | Reference | Reference | Reference | Reference | Reference | Reference |
Urban-rural status | ||||||
 Rural | 0.79 (0.78–0.79) | 2.34 (2.30–2.37) | 1.16 (1.13–1.20) | 0.73 (0.72–0.73) | 2.28 (2.25–2.31) | 1.15 (1.11–1.20) |
 Urban | Reference | Reference | Reference | Reference | Reference | Reference |