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Table 4 Regression coefficients representing preferences of parents and adolescents for attributes of asthma control

From: Parents and adolescents preferences for asthma control: a best-worst scaling choice experiment using an orthogonal main effects design

Attribute Parents (n = 52) Adolescents (n = 44)
Beta Lower CI Upper CI P-value Beta Lower CI Upper CI P-value
Night Time Symptoms
  None 2.09 1.64 2.55 <0.00001 1.91 1.40 2.42 <0.00001
  3 days per week −0.18 −0.61 0.24 0.40 −0.25 −0.73 0.23 0.32
  5 days per week −0.90 −1.33 −0.46 <0.00001 −1.15 −1.62 −0.69 <0.00001
Wheezing or tightening of chest
  None 1.88 1.42 2.34 <0.00001 1.43 0.92 1.94 <0.00001
  Manageable 0.68 0.23 1.12 0.00290 0.55 0.05 1.04 0.03000
  Bothersome −0.87 −1.29 −0.45 <0.00001 −1.15 −1.61 −0.70 <0.00001
Changing Medication
  None 1.02 0.58 1.47 <0.00001 1.26 0.76 1.77 <0.00001
  More doses/add medication 0.11 −0.33 0.56 0.62 −0.03 −0.52 0.47 0.92
  Add oral steroids for 5 days −0.20 −0.66 0.26 0.39 0.02 −0.49 0.53 0.94
Emergency room visits
  None 1.82 1.37 2.28 <0.00001 1.90 1.39 2.41 <0.00001
  4 per year −1.14 −1.55 −0.73 <0.00001 −1.17 −1.62 −0.71 <0.00001
  10 per year −2.15 −2.58 −1.73 <0.00001 −1.83 −2.28 −1.39 <0.00001
Physical activity limitations
  None 1.31 0.85 1.77 <0.00001 2.17 1.66 2.68 <0.00001
  2 per month −0.14 −0.60 0.32 0.54 −0.29 −0.78 0.21 0.26
  10 per month −1.14 -- -- -- −1.97 -- -- --
  1. Conditional logit regression was used to analyse the choice data. The coefficients for all attribute levels were estimated relative to the reference level of 10 physical activity limitations per month. The estimated coefficients represent respondents’ average preference weights for a given attribute level relative to the reference level. R2(0) Goodness of fit for model with no intercept 0.2591 for parent model and 0.2804 for adolescent model