Table 2 Adjusted parameter estimates (β) and p-values for quantile regression, ordinary least-squares regression, and the generalized linear mixed model
From: Using quantile regression to investigate racial disparities in medication non-adherence
| Â | QReg | OLS | GLMM | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Â | Quantile 1 | Quantile 2 | Quantile 3 | Quantile 4 | Â | Â | Â | Â | ||||
Parameter | β | P | β | P | β | P | β | P | β | P | β | P |
Intercept | 38.2 | 0.00 | 49.2 | 0.00 | 72.1 | 0.00 | 82.6 | 0.00 | 88.2 | 0.00 | 89.5 | 0.00 |
NHB | -3.42 | 0.11 | -5.42 | 0.01 | -3.1 | 0.00 | -2.0 | 0.00 | -1.4 | 0.00 | -1.3 | 0.00 |
Other | -6.33 | 0.00 | -3.75 | 0.09 | -0.9 | 0.34 | 0.5 | 0.36 | -0.1 | 0.74 | -0.1 | 0.70 |
NHW (REF) | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
Male | -11.4 | 0.04 | -7.00 | 0.22 | 0.4 | 0.86 | 1.1 | 0.42 | -0.5 | 0.58 | -0.4 | 0.62 |
Age | 0.24 | 0.01 | 0.27 | 0.00 | 0.2 | 0.00 | 0.1 | 0.00 | 0.1 | 0.00 | 0.1 | 0.00 |
Age-squared | -0.01 | 0.14 | -0.01 | 0.04 | 0.0 | 0.11 | 0.0 | 0.00 | 0.0 | 0.00 | 0.0 | 0.00 |
Never Married | -2.84 | 0.45 | -7.62 | 0.05 | -0.5 | 0.79 | -1.8 | 0.06 | -0.9 | 0.16 | 0.9 | 0.13 |
Divorced | -3.37 | 0.09 | -5.35 | 0.01 | -2.9 | 0.00 | -2.6 | 0.00 | -1.4 | 0.00 | 1.2 | 0.00 |
Married (REF) | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
Employed | 5.49 | 0.02 | 4.52 | 0.07 | 2.8 | 0.01 | 1.1 | 0.06 | 1.3 | 0.00 | 0.6 | 0.15 |
Retired | -1.03 | 0.61 | 2.04 | 0.34 | 1.9 | 0.04 | 1.3 | 0.01 | 0.6 | 0.06 | -0.6 | 0.04 |
Unemployed (REF) | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
Cancer | -8.24 | 0.05 | -13.0 | 0.00 | -3.1 | 0.10 | -0.4 | 0.70 | -1.4 | 0.05 | -1.0 | 0.11 |
CHD | 14.8 | 0.00 | 8.2 | 0.01 | 0.0 | 1.00 | 0.4 | 0.65 | 0.7 | 0.19 | 0.5 | 0.31 |
CHF | 1.37 | 0.71 | 0.3 | 0.93 | -1.0 | 0.54 | -2.0 | 0.04 | -0.9 | 0.16 | -0.9 | 0.08 |
Hypertension | 0.46 | 0.86 | -0.5 | 0.85 | -0.8 | 0.51 | -1.6 | 0.02 | -1.1 | 0.01 | -0.9 | 0.02 |
Poor HbA1c | 12.2 | 0.00 | 7.1 | 0.01 | -0.6 | 0.58 | -2.7 | 0.00 | -1.0 | 0.02 | -5.0 | 0.00 |
Stroke | -1.60 | 0.75 | -4.7 | 0.37 | -0.5 | 0.81 | -0.7 | 0.58 | -0.6 | 0.47 | -0.5 | 0.47 |
Bipolar | -4.16 | 0.54 | -5.1 | 0.47 | 2.3 | 0.45 | -0.6 | 0.72 | -0.2 | 0.84 | 0.1 | 0.93 |
GAD | 1.53 | 0.79 | -1.1 | 0.86 | 3.7 | 0.16 | 1.6 | 0.28 | 0.9 | 0.36 | 0.6 | 0.45 |
Psychoses | 7.28 | 0.23 | 6.8 | 0.28 | -3.4 | 0.21 | 0.9 | 0.57 | 0.0 | 1.00 | -0.5 | 0.53 |
PTSD | -3.30 | 0.40 | -1.6 | 0.70 | 2.6 | 0.14 | 1.4 | 0.18 | 0.7 | 0.30 | 0.9 | 0.12 |
Substance Use | 7.00 | 0.01 | 5.78 | 0.03 | 2.6 | 0.02 | 1.5 | 0.02 | 1.0 | 0.02 | 0.8 | 0.03 |