Table 1.
Characteristics of the study population.
| Variables | Control (N = 43,352) | A-fib (N = 8765) | P value |
|---|---|---|---|
| Glaucoma | 0.0042 | ||
| No event | 42,069 (97.04) | 8455 (96.46) | |
| Event | 12,83 (2.96) | 310 (3.54) | |
| Hypertension | <0.0001 | ||
| No | 31,500 (72.66) | 4415 (50.37) | |
| Yes | 11,852 (27.34) | 4350 (49.63) | |
| Diabetes mellitus | <0.0001 | ||
| No | 36,047 (85.18) | 6274 (71.58) | |
| Yes | 7305 (16.85) | 2491 (28.42) | |
| Chronic renal failure | <0.0001 | ||
| No | 43,102 (99.42) | 8594 (98.05) | |
| Yes | 250 (0.58) | 171 (1.95) | |
| Hyperlipidaemia | <0.0001 | ||
| No | 37,208 (85.83) | 6435 (73.42) | |
| Yes | 6144 (14.17) | 2330 (26.58) | |
| Variables for matching | |||
| Year | 0.7247 | ||
| 2003 | 9397 (83.19) | 1899 (16.81) | |
| 2004 | 8830 (82.79) | 1836 (17.21) | |
| 2005 | 9258 (83.51) | 1828 (16.49) | |
| 2006 | 7972 (83.22) | 1608 (16.78) | |
| 2007 | 7895 (83.2) | 1594 (16.8) | |
| Age group (year) | 0.8309 | ||
| <50 | 11,865 (83.33) | 2374 (16.67) | |
| 50–59 | 7705 (83.3) | 1545 (16.7) | |
| 60–69 | 10,930 (83.23) | 2203 (16.77) | |
| 70–79 | 8733 (83.09) | 1777 (16.91) | |
| ≥80 | 4119 (82.63) | 866 (17.37) | |
| Sex | 0.8849 | ||
| Male | 22,260 (83.16) | 4508 (16.84) | |
| Female | 21,092 (83.21) | 4257 (16.79) | |
| Residence | 0.9999 | ||
| Seoul (metropolitan) | 8388 (83.19) | 1695 (16.81) | |
| 2nd area | 2366 (83.13) | 480 (16.87) | |
| 3rd area | 2949 (83.19) | 596 (16.81) | |
| 4th area | 29,649 (83.18) | 5994 (16.82) | |
| Household income | 0.9906 | ||
| 0–30% | 9275 (83.14) | 1881 (16.86) | |
| 30–70% | 14,794 (83.2) | 2988 (16.8) | |
| 70–100% | 19,283 (83.19) | 3896 (16.81) | |
A-fib atrial fibrillation.
P-value by Chi-square test.
Percent proportion is indicated in ().