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Table 3 Multiple linear regression analyses predicting annual direct household costs among participants falling above and below the provincial median annual income level

From: The excess costs of childhood food allergy on Canadian families: a cross-sectional study

  Participants above the provincial median income level Participants below the provincial median income level
Cases (n = 20) Controls (n = 19) Difference 95% CI of the difference p-value Cases (n = 15) Controls (n = 16) Difference 95% CI of the difference p-value
Total annual direct costs $14,427.65 $10,197.60 $4230.04 $963.44, $7496.65 0.01 $10,264.09 $9527.69 $736.40 $ − 1594.05, $3069.85 0.52
 Food costs $14,329.68 $10,178.23 $4151.44 $861.49, $7441.40 0.02 $10,142.41 $9510.14 $632.27 $ − 1692.52, $2957.05 0.58
 Transportation costs $46.43 $26.80 $19.63 $ − 18.28, $57.55 0.30 $81.06 $18.93 $62.14 $21.60, $102.67 0.004
  Medication costs $51.45 $ − 7.42 $58.96 $ − 2.63, $120.56 0.06 $40.62 $ − 1.37 $41.99 $ − 6.69, $90.68 0.09
  1. Annual household income, number of household members, and allergic comorbidities status (i.e., presence vs. absence) are included as covariates in each of the models
  2. 95% CI 95th percent confidence interval