Table 2.
Population-weighted demographic and clinical characteristics by total pathogen burden level in subjects aged ⩾25 years assessed for mortality status in the National Health and Nutrition Examination Survey III (1988–1994)
| Total pathogen burden level | |||||||
|---|---|---|---|---|---|---|---|
| Total | 0 | 1 | 2 | 3 | 4 | ||
| Covariates | (N = 6522) | (N = 349) | (N = 857) | (N = 1706) | (N = 2 472) | (N = 1 138) | P value† |
| Age, years, mean (s.e.) | 47·7 (0·4) | 38·0 (0·7) | 42·6 (0·4) | 48·3 (0·5) | 52·7 (0·9) | 54·0 (1·0) | <0·001* |
| Gender, % | |||||||
| Female (N = 3253) | 52·4 | 41·9 | 45·3 | 55·7 | 55·9 | 60·8 | <0·001* |
| Male (N = 3269) | 47·6 | 58·1 | 54·7 | 44·3 | 44·1 | 39·2 | |
| Race/ethnicity, % | |||||||
| Non-Hispanic white (N = 3084) | 79·6 | 95·8 | 91·8 | 83·8 | 69·7 | 47·8 | <0·001* |
| Non-Hispanic black (N = 1571) | 9·7 | 2·2 | 3·4 | 7·5 | 12·6 | 32·0 | |
| Other (N = 1867) | 10·7 | 2·0 | 4·8 | 8·7 | 17·6 | 20·2 | |
| Education, years, mean (s.e.)‡ | 12·3 (0·1) | 14·0 (0·2) | 13·6 (0·2) | 12·5 (0·1) | 11·1 (0·2) | 10·3 (0·2) | <0·001* |
| Body mass index, kg/m2, mean (s.e.)§ | 26·5 (0·1) | 25·5 (0·3) | 26·4 (0·2) | 26·3 (0·2) | 26·9 (0·2) | 27·4 (0·3) | <0·001* |
| Smoking status, % | |||||||
| Never (N = 2891) | 42·1 | 47·9 | 43·1 | 39·4 | 41·4 | 44·0 | 0·064 |
| Former (N = 1858) | 28·1 | 26·2 | 28·5 | 29·3 | 28·8 | 22·8 | |
| Current (N = 1773) | 29·8 | 25·9 | 28·4 | 31·3 | 29·8 | 33·2 | |
s.e., Standard error.
†
Two-sided P values for Cochran–Mantel–Haenszel tests for trend for categorical variables and analysis of variance for tests of linear trend for continuous variables.
‡
N = 6480 due to 42 subjects missing data on education level.
§
N = 6499 due to 23 subjects missing data on body mass index.
*
P < 0·05.