Table 1.
Sample characteristics for each NHANES wave
| Overall 2007–2012 (N = 13,328) | 2007–2008 (N = 4237) | 2009–2010 (N = 4783) | 2011–2012 (N = 4308) | |||||
|---|---|---|---|---|---|---|---|---|
| %(N) | 95% CI | %(N) | 95% CI | %(N) | 95% CI | %(N) | 95% CI | |
| Age (years) | ||||||||
| 20–39 | 39.7% (5009) | 37.5%—42.0% | 40.5 (1529) | 37.3%—43.7% | 39.5 (1787) | 36.7%—42.2% | 39.2 (1693) | 34.0%—44.7% |
| 40–64 | 48.1% (6071) | 46.2%—49.9% | 48 (1935) | 45.5%—50.6% | 47.8 (2180) | 45.5%—50.1% | 48.4 (156) | 43.9%—53% |
| 65 + | 12.2% (2248) | 11.4%—13.1% | 11.5 (773) | 10.0%—13.1% | 12.7 (816) | 11.4%—14.2% | 12.4 (659) | 11.1%—13.9% |
| Gender | ||||||||
| Male | 49.5% (6650) | 48.6%—50.4% | 49.6% (2131) | 48.2%—51.1% | 49.6% (2353) | 48.3%—51% | 49.1% (2166) | 47.2%—51.2% |
| Female | 50.5% (6678) | 49.6%—51.4% | 50.4% (2106) | 49%—51.8% | 50.4% (2430) | 49%—51.7% | 50.9% (2142) | 48.8%—52.8% |
| Smoking Status | ||||||||
| Current | 21.7% (3030) | 20.3%—23.1% | 23.8% (1016) | 20.8%—27.1% | 20.9% (1102) | 19.3%—22.6% | 20.5% (912) | 18%—23.2% |
| Former | 23.3% (2999) | 21.8%—24.9% | 23.7% (1017) | 22.1%—25.4% | 23% (1069) | 20.1%—26.4% | 23.2% (913) | 20.1%—26.6% |
| Never | 55.0% (7299) | 53.0%—57.1% | 52.5% (2204) | 48.5%—56.4% | 56.1% (2612) | 52.2%—59.9% | 56.4% (2483) | 53.1%—59.6% |
| Race/Ethnicity | ||||||||
| Mexican | 8.4% (2108) | 6.5%—10.7% | 8.5% (768) | 6%—12% | 8.8% (905) | 5.1%—14.6% | 7.8% (434) | 4.8%—12.4% |
| Other Hispanic | 5.6% (1436) | 4.2%—7.3% | 4.9% (481) | 3%—7.9% | 5.3% (521) | 3.1%—8.9% | 6.5% (434) | 4%—10.3% |
| NH White | 68.0% (5698) | 63.5%—72.1% | 70.1% (1970) | 61.9%—77.3% | 67.8% (2231) | 60.4%—74.5% | 66.2% (1497) | 57.2%—74.1% |
| NH Black | 11.3% (2911) | 9.3%—13.5% | 10.7% (852) | 7.2%—15.5% | 11.3% (876) | 9.5%—13.3% | 11.8% (1183) | 7.8%—17.4% |
| Other | 6.9% (1175) | 5.7%—8.3% | 5.9% (116) | 3.8%—8.9% | 6.8% (249) | 5%—9.3% | 7.8% (760) | 5.7%—10.7% |
| COPD Severity | ||||||||
| GOLD 0 | 76.4% (9677) | 75.2%—77.6% | 76.2% (3072) | 74.1%—78.1% | 77.25% (3565) | 75.2%—79.2% | 75.8% (3040 | 73.3%—78.1% |
| PRISm | 9.8% (1862) | 8.9%—10.8% | 9.6% (536) | 8.1%—11.4% | 9.6% (593) | 7.9%—11.7% | 10.2% (733) | 8.7%—11.9% |
| GOLD 1 | 6.9% (810) | 6.2%—7.7% | 7.1% (287) | 6.2%—8.3% | 7.2% (299) | 5.7%—9.1% | 6.5% (224) | 5.4%—7.8% |
| GOLD 2 | 6.0% (836) | 5.4%—6.6% | 6.3% (300) | 5.2%—7.5% | 5.3% (277) | 4.6%—6% | 6.5% (259) | 5.3%—7.9% |
| GOLD 3–4 | 0.9% (143) | 0.7%—1.1% | 0.9% (42) | 0.5%—1.4% | 0.7% (49) | 0.4%—1.1% | 1.2% (52) | 0.8%—1.6% |
| COPD (GOLD 1–4) | 13.8% (1789) | 12.8%—14.9% | 14.3% (629) | 12.4%—16.3% | 13.1% (624) | 11.2%—15.4% | 14.1% (535) | 12.3%—16% |