Table 2.
Mean Biomarker Levels and Difference in Mean Biomarker Rates at Baseline, 6 Months, and 24 Months by Insurance Status
| Outcome | Mean biomarker levels and 95% CI | Rates of change (units/month) | |||||
|---|---|---|---|---|---|---|---|
| Baseline | 6 months | 24 months | 0 to 6 months | p value | 6 to 24 months | p value | |
| HbA1c (%) (n = 608) | |||||||
| Insured | 10.6 (10.4, 10.7) | 9.0 (8.8, 9.3) | 9.4 (9.2, 9.7) | −0.34 | 0.021 | 0.03 | 0.304 |
| Uninsured | 10.6 (10.5, 10.7) | 9.1 (8.8, 9.3) | 9.4 (9.3, 9.7) | −0.26 | 0.02 | ||
| SBP (mmHg) (n = 1244) | |||||||
| Insured | 147.8 (146.9, 149.0) | 134.8 (133.6, 135.7) | 135.4 (134.3, 136.9) | −2.18 | 0.377 | 0.04 | 0.965 |
| Uninsured | 149.1 (148.0, 150.3) | 136.8 (135.7, 138.0) | 137.5 (136.2, 139.0) | −2.04 | 0.03 | ||
| DBP (mmHg) (n = 1244) | |||||||
| Insured | 94.1 (93.6, 94.9) | 84.6 (84.1, 85.5) | 84.4 (83.4, 85.5) | −1.57 | 0.248 | −0.01 | 0.329 |
| Uninsured | 94.7 (94.1, 95.5) | 86.0 (85.4, 86.9) | 85.1 (84.1, 86.1) | −1.45 | −0.05 | ||
| LDL (mg/dL) (n = 546) | |||||||
| Insured | 181.3 (180.4, 185.2) | 131.0 (122.3, 134.9) | 148.5 (142.3, 158.5) | −8.37 | 0.445 | 0.97 | 0.150 |
| Uninsured | 181.5 (179.0, 185.2) | 135.5 (125.3, 137.8) | 141.3 (138.7, 152.7) | −7.78 | 0.32 | ||
Bold = significant at p < 0.05
Likelihood ratio tests for spline were significant for all models at p < 0.001
CIs constructed using 5000 clustered bootstrap replicates
Hyperlipidemia cohort model adjusted for: race/ethnicity, number of encounters prior to baseline
Hypertension cohort model adjusted for: number of encounters prior to baseline
SBP systolic blood pressure, DBP diastolic blood pressure, LDL low-density lipoprotein, CI confidence interval