Which of the following predictor variables (excluding the Intercept) were statis

Question

Which of the following predictor variables (excluding the Intercept) were statistically significantly associated with increased total health care costs, excluding Rx costs, in year 2 (on the natural log scale)? Choose all that apply.

Dependent Variable Natural Log of Total Health Care Costs Adherence: MPR (Pen Only, Year 2) Predictor Variable (Excludes Rx, Year 2) MPR, pen only, year 2 Age, y Age squared Male sex White race Charlson comorbidity index MPR, all prescriptions, year 1 Musculoskeletal comorbidity MPR for OADs, year 1 Health care costs, year 1, excluding Rx costs No. of days hospitalized, year1 ED 1 0.045 (0.19) 0.011 (0.22) 0.000074 (0.000022 0.25 (0.13) 0.19 (0.10) 0.039 (0.018)* 1.045 (0.49)* 0.054 (0.17) 0.13 (0.26) 0.000049 (0.0000060)t 0.0044 (0.011) 0.060 (0.11) 7.22 (0.37)t 0.47 0.025 (0.11) 0.000021 (0.000095) 0.002 (0.056) 0.048 (0.78) 0.0052 (0.0076) 0.2228 (0.21) 0.006 (0.046) 0.10235 (0.11) visits, year Intercept Adjusted R2 0.00000142 (0.0000026) 0.0021 (0.0051) 0.072 (0.051) 0.44 (0.28) 0.045

Explanation / Answer

Variables that have p-values smaller than 0.05 are statistically significantly associated with increased total health care costs, excluding Rx costs, in year 2 (on the natural log scale). Therefore, the variables Age squared, Charlson comorbidity index, Health care costs, year 1, excluding Rx costs and No. of days hospitalized, year 1 are variables that are statistically significant.

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