Table 4.
Time to Achieve Glycemic Control and Time to Failure to Maintain Glycemic Control by Residential Environment Composite Score Quintiles for Individuals Who Stayed in Their Residence, New York City, 2007–2009
| HbA1c Level and Quintile of Residential Environment Composite Score Category | No. | Median timea | 95% CI | HR | 95% CI | P Value |
|---|---|---|---|---|---|---|
| Time to Achieve Glycemic Control | ||||||
| HbA1c ≥7%b,c | 103,479 | |||||
| 1 | 27,193 | 11.5 | 11.4, 11.7 | 1.00 | Referent | Referent |
| 2 | 29,031 | 11.3 | 11.2, 11.5 | 1.02 | 1.01, 1.03 | <0.001 |
| 3 | 23,887 | 10.8 | 10.6, 11.0 | 1.09 | 1.08, 1.11 | <0.001 |
| 4 | 14,868 | 10.6 | 10.4, 10.8 | 1.12 | 1.10, 1.14 | <0.001 |
| 5 | 8,500 | 9.9 | 9.6, 10.1 | 1.14 | 1.12, 1.16 | <0.001 |
| Time to Failure to Maintain Glycemic Control | ||||||
| HbA1c <7%b,c | 79,277 | |||||
| 1 | 16,629 | 9.7 | 9.6, 9.9 | 1.00 | Referent | Referent |
| 2 | 19,681 | 10.1 | 9.9, 10.2 | 0.99 | 0.97, 0.99 | <0.001 |
| 3 | 20,439 | 10.7 | 10.6, 10.9 | 0.91 | 0.90, 0.93 | <0.001 |
| 4 | 13,933 | 11.1 | 10.9, 11.2 | 0.88 | 0.87, 0.90 | <0.001 |
| 5 | 8,595 | 10.9 | 10.7, 11.1 | 0.87 | 0.85, 0.89 | <0.001 |
Abbreviations: CI, confidence interval; HbA1c, hemoglobin A1c; HR, hazard ratio.
a Median time to event in months.
b First HbA1c test of 2007.
c The first quintile represents the least advantaged residential environment; the fifth quintile represents the most advantaged residential environment.