Table 1.
Demographic characteristics of ANA positive and ANA negative U.S. adults ages 50 years and older, NHANES 2001-2004, N=1,012
| N | ANA+ (95% CI) n=175 |
ANA- (95% CI) n=837 |
P-value1 | |
|---|---|---|---|---|
| Weighted Mean | ||||
| Age | 1012 | 63.3 (60.8, 65.8) | 63.0 (62.1, 64.0) | 0.84 |
| BMI (kg/m2) | 1012 | 28.4 (27.4, 29.4) | 28.5 (28.1, 29.0) | 0.80 |
| Weighted Percent | ||||
| Sex | 0.02 | |||
| Female | 497 | 62.1 (53.8, 70.4) | 50.4 (46.5, 54.3) | |
| Male | 515 | 37.9 (29.6, 46.2) | 49.6 (45.7, 53.5) | |
| Race/ethnicity | 0.08 | |||
| Non-Hispanic White | 644 | 73.3 (64.2, 82.4) | 82.2 (77.2, 87.1) | |
| Non-Hispanic Black | 147 | 13.3 (5.7, 20.8) | 7.7 (4.9, 10.5) | |
| Other | 221 | 13.4 (5.4, 21.4) | 10.1 (6.6, 13.7) | |
| Education | 0.62 | |||
| < High school | 345 | 25.2 (17.1, 33.2) | 21.9 (18.1, 25.7) | |
| High school | 232 | 21.3 (12.0, 30.5) | 25.1 (21.8, 28.4) | |
| >High school | 435 | 53.6 (43.8, 63.3) | 53.0 (48.8, 57.1) | |
| Physical Activity | 0.01 | |||
| Any moderate or vigorous | 497 | 44.7 (38.2, 51.3) | 57.0 (51.9, 62.1) | |
| No moderate or vigorous | 434 | 43.6 (36.3, 51.0) | 37.1 (32.3, 41.7) | |
| Unable | 81 | 11.6 (5.6, 17.6) | 5.9 (4.3, 7.5) | |
| Season of blood collection | 0.67 | |||
| Summer | 590 | 64.7 (53.1, 76.3) | 66.7 (58.7, 74.6) | |
| Winter | 422 | 35.3 (23.7, 46.9) | 33.3 (25.4, 41.3) | |
| NHANES Cycle | 0.41 | |||
| 2001-2002 | 489 | 47.8 (37.3, 58.2) | 43.3 (35.1, 51.6) | |
| 2003-2004 | 523 | 52.2 (41.8, 62.7) | 56.7 (48.4, 64.9) | |
1
Rao Scott Chi-Square for categorical variables, Wald F-statistic for continuous variables Bold is statistically significant at p = 0.05,
BMI: body mass index