Table 1. Characteristics of included participants stratified by region.
| All | South | Central | North | East | P | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N | % | N | % | N | % | N | % | N | % | |||
| All | 1087710877 | 100100 | 576576 | 5.35.3 | 10061006 | 9.29.2 | 28222822 | 25.925.9 | 64736473 | 59.559.5 | ||
| Gender | Male | 58595859 | 53.953.9 | 311311 | 54.054.0 | 592592 | 58.858.8 | 14091409 | 49.950.1 | 35473547 | 54.845.2 | <0.0001 |
| Female | 50185018 | 46.146.1 | 265265 | 46.046.0 | 414414 | 41.241.2 | 14131413 | 50.162.8 | 29262926 | 45.254.8 | ||
| Ethnicity | Caucasian | 93679367 | 86.186.1 | 481481 | 83.583.5 | 682682 | 67.867.8 | 17721772 | 62.811.7 | 64326432 | 99.40.2 | <0.0001 |
| Asian | 376376 | 3.53.5 | 1212 | 2.12.1 | 1919 | 1.91.9 | 329329 | 11.78.7 | 1616 | 0.20.0 | ||
| African | 344344 | 3.23.2 | 77 | 1.21.2 | 9191 | 9.09.0 | 245245 | 8.716.9 | 11 | 0.00.4 | ||
| Unknown | 790790 | 7.37.3 | 7676 | 13.213.2 | 214214 | 21.321.3 | 476476 | 16.920.4 | 2424 | 0.410.1 | ||
| Setting | Outpatient | 48634863 | 44.744.7 | 244244 | 42.442.4 | 475475 | 47.247.2 | 18891889 | 66.916.5 | 22552255 | 34.850.0 | <0.0001 |
| In patient | 41814181 | 38.438.4 | 244244 | 42.442.4 | 235235 | 23.423.4 | 465465 | 16.516.3 | 32373237 | 50.00.2 | ||
| Prim. care | 688688 | 6.36.3 | 7272 | 12.512.5 | 147147 | 14.614.6 | 459459 | 16.30.3 | 1010 | 0.215.0 | ||
| Unknown | 11451145 | 10.510.5 | 1616 | 2.82.8 | 149149 | 14.814.8 | 99 | 0.30.0 | 971971 | 15.00.0 | ||
| Median | IQR | Median | IQR | Median | IQR | Median | IQR | Median | IQR | |||
| Age | Years | 36 | 26–48 | 39 | 30–51 | 41 | 31–52 | 38 | 29–51 | 33 | 26–44 | <0.0001 |
| Date | Mm/yy | 7/13 | 1/13–2/14 | 6/13 | 11/12–2/14 | 8/13 | 12/12–1/14 | 9/13 | 3/13–4/14 | 6/13 | 1/13–1/14 | <0.0001 |
Age calculated at date of blood sample date. IQR; interquartile range. P-value from chi-squared test for categorical variables and Wilcoxon test for continuous variables. Prim. Care; primary care. Mm/yy; calendar month and year.