Table 1 Basic characteristics of participants (n = 16,636) in the NHANES 1999–2010
Outcomes | Total | Normal (N = 15,582) | COPD (N = 1054) | P |
|---|---|---|---|---|
Age | 56.623(0.189) | 56.322(0.190) | 61.236(0.428) | < 0.0001 |
Gender | 0.079 | |||
Male | 8325(50.042) | 7719(47.360) | 606(50.408) | |
Female | 8311(49.958) | 7863(52.640) | 448(49.592) | |
Race | < 0.0001 | |||
Non-Hispanic White | 8965(53.889) | 8213(76.299) | 752(85.775) | |
Non-Hispanic Black | 3083(18.532) | 2922(9.589) | 161(7.004) | |
Mexican American | 3049(18.328) | 2994(5.516) | 55(1.192) | |
Other | 1539(9.251) | 1453(8.596) | 86(6.028) | |
Education levels | < 0.0001 | |||
less than high school | 2749(16.524) | 2591(7.432) | 158(9.590) | |
high school | 2598(15.617) | 2380(11.642) | 218(17.813) | |
more than high school | 11,289(67.859) | 10,611(80.926) | 678(72.597) | |
PIR | < 0.0001 | |||
<1.85 | 6651(39.98) | 6132(25.746) | 519(36.887) | |
>=1.85 | 9985(60.02) | 9450(74.254) | 535(63.113) | |
BMI | 28.858(0.080) | 28.877(0.084) | 28.554(0.296) | 0.298 |
Smoking status | < 0.0001 | |||
never | 7979(47.962) | 7820(50.870) | 159(16.795) | |
former | 5457(32.802) | 4919(30.487) | 538(48.573) | |
now | 3200(19.235) | 2843(18.643) | 357(34.632) | |
History of diabetes | 0.003 | |||
no | 11,652(70.041) | 10,968(76.621) | 684(71.949) | |
IFG and IGT | 1365(8.205) | 1273(7.581) | 92(8.503) | |
DM | 3619(21.754) | 3341(15.799) | 278(19.548) | |
History of hypertension | < 0.0001 | |||
no | 7465(44.873) | 7090(52.318) | 375(40.464) | |
yes | 9171(55.127) | 8492(47.682) | 679(59.536) | |
CVD | < 0.0001 | |||
no | 13,911(83.62) | 13,195(87.880) | 716(72.769) | |
yes | 2725(16.38) | 2387(12.120) | 338(27.231) | |
SII | 520.000(377.167,722.917) | 515.667(375.667,715.333) | 591.500(406.381,860.706) | < 0.0001 |
WBC | 7.138(0.027) | 7.109(0.028) | 7.585(0.092) | < 0.0001 |
CRP | 0.440(0.008) | 0.429(0.007) | 0.605(0.044) | < 0.001 |