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Table 2 Stratified adjusted models (< 1 year old and ≥ 1 year old) showing incidence rate ratios for the three service types, comparing the false positive cohort with the primary (unmatched) comparison cohort

From: The health system impact of false positive newborn screening results for medium-chain acyl-CoA dehydrogenase deficiency: a cohort study

 

Adjusted incidence rate ratio (95 % CI)

 

< 1 year of age

≥ 1 year of age

 

Physician visits

ED visits

Hospitalizations

Physician visits

ED visits

Hospitalizations

False Positive

1.42 (1.21–1.67)

1.27 (0.80–2.03)

2.32 (1.22–4.34)

0.96 (0.77–1.20)

0.82 (0.54–1.26)

0.68 (0.15–2.25)

Sex

      

 Female

0.92 (0.91–0.92)

0.85 (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

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Season of birth

      

 Jan.–Apr.

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 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 (1.00–1.01)

1.02 (1.00–1.03)

1.08 (1.06–1.11)

1.00 (0.99–1.00)

1.00 (0.99–1.00)

1.03 (1.00–1.05)

Birth weight

      

  < 2500 g

1.75 (1.74–1.77)

1.04 (1.01–1.06)

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

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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

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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’

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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

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