Table 1.
Characteristics of ZCTAs Included in Analyses of the Association between Neighborhood Demographics and CPAP Adherence
| Primary Analysis (N = 26,180) | Sensitivity Analysis (N = 13,387) | All ZCTAs (N = 31,044) | |
|---|---|---|---|
| Adult residents per ZCTA | 3,815 (1,093–14,006) | 12,327 (2,969–23,075) | 2,550 (724–11,264 |
| Male adults, % | 49.0 (47.2–51.1) | 48.5 (47.1–50.1) | 49.1 (47.2–51.5) |
| Adults aged 65 or older, % | 20.7 (16.8–24.6) | 22.1 (17.6–26.8) | 22.3 (17.6–27.3) |
| Black adults, % | 1.5 (0.0–8.1) | 3.8 (1.0–12.7) | 1.1 (0.0–7.0) |
| Hispanic adults, % | 3.0 (0.9–8.7) | 4.7 (1.9–12.5) | 2.8 (0.7–8.2) |
| Adults without a bachelor’s degree, % | 81.0 (70.1–87.1) | 77.5 (64.3–85.0) | 81.6 (71.5–87.8) |
| Household income, $ | 54,600 (43,600–69,900) | 54,200 (43,300–68,500) | 57,800 (45,600–77,000) |
| Adults living below the poverty line, % | 10.8 (6.7–16.3) | 10.5 (6.6–15.8) | 10.8 (6.6–16.4) |
| Geographic region, n (%) | |||
| Northeast | 5,159 (19.7) | 2,986 (22.3) | 5,753 (18.5) |
| Southeast | 5,779 (22.1) | 3,308 (24.7) | 6,479 (20.9) |
| Midwest | 8,257 (31.5) | 3,255 (24.3) | 10,460 (33.7) |
| South Central | 2,987 (11.4) | 1,549 (11.6) | 3,467 (11.2) |
| Mountain West | 1,506 (5.8) | 780 (5.8) | 1,990 (6.4) |
| West Coast | 2,492 (9.5) | 1,509 (11.3) | 2,895 (9.2) |
| Number of CPAP users per ZCTA | 11 (3–36) | 35 (19–68) | — |
Definition of abbreviations: CPAP = continuous positive airway pressure; ZCTA = ZIP code tabulation area.
Median and interquartile range of demographic characteristics of ZCTAs included in analyses of the association between neighborhood demographics and CPAP adherence. The primary analysis included all ZCTAs in the 50 U.S. states plus the District of Columbia with 100 adult residents and at least one individual initiating CPAP between November 1, 2015, and October 31, 2018, in the Philips Encore database. The sensitivity analysis were restricted to those ZCTAs with more than 10 CPAP users. Data on all ZCTAs in the 50 U.S. states plus the District of Columbia with 100 adult residents are provided as a reference.