Table 1. Baseline characteristics of patients with AF with hospitalizations from 2005–2014.
| 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | P trend | |
| Total hospitalizations | 310,440 | 314,943 | 316,735 | 332044 | 337,476 | 358,266 | 413,589 | 397,760 | 408,250 | 416,570 | < 0.001 |
| Mean age, yrs | 92.5 | 92.6 | 92.6 | 92.6 | 92.7 | 92.6 | 92.6 | 90* | 90* | 90* | - |
| Female, % | 69.7% | 68.8% | 68.7% | 68.7% | 68.2% | 67.5% | 67.4% | 66.3% | 65.5% | 64.6% | < 0.001 |
| Race, % | |||||||||||
| White | 90.0% | 87.6% | 88.2% | 88.3% | 88.1% | 88.2% | 88.5% | 88.0% | 87.8% | 87.6% | < 0.001 |
| Black | 3.8% | 5.0% | 4.6% | 4.2% | 4.1% | 4.9% | 4.8% | 4.5% | 4.6% | 4.7% | 0.030 |
| Other | 6.2% | 7.4% | 7.2% | 7.5% | 7.8% | 6.9% | 6.6% | 7.5% | 7.6% | 7.7% | 0.001 |
| Payment type, % | |||||||||||
| Medicare/Medicaid | 95.7% | 95.8% | 94.4% | 93.9% | 94.2% | 94.5% | 95.2% | 95.7% | 95.2% | 95.1% | < 0.001 |
| Private insurance | 3.5% | 3.4% | 4.6% | 4.9% | 4.7% | 4.4% | 3.8% | 3.3% | 3.6% | 3.8% | < 0.001 |
| Self-pay/other | 0.8% | 0.8% | 1.0% | 1.2% | 1.1% | 1.1% | 1.0% | 1.0% | 1.2% | 1.1% | < 0.001 |
| AHRQ comorbidity measures (%) | |||||||||||
| Prior CHF | 41.5% | 40.6% | 40.4% | 38.1% | 37.9% | 38.1% | 38.5% | 39.2% | 39.6% | 39.7% | < 0.001 |
| Hypertension | 58.0% | 61.6% | 46.0% | 47.4% | 69.7% | 71.6% | 72.0% | 76.9% | 77.6% | 79.2% | < 0.001 |
| Diabetes mellitus | 14.7% | 15.4% | 16.7% | 17.9% | 18.2% | 19.0% | 19.4% | 21.2% | 21.5% | 22.4% | < 0.001 |
| Peripheral vascular disease | 5.5% | 5.9% | 6.1% | 6.7% | 6.9% | 7.0% | 7.5% | 9.0% | 9.4% | 9.7% | < 0.001 |
| Prior CAD | 32.5% | 32.8% | 34.2% | 35.4% | 35.7% | 35.8% | 36.5% | 40.0% | 39.4% | 40.1% | < 0.001 |
| Prior stroke | 7.6% | 7.8% | 7.9% | 8.5% | 8.6% | 8.5% | 8.5% | 8.9% | 9.2% | 9.3% | < 0.001 |
| Chronic lung disease | 22.5% | 22.7% | 22.8% | 21.3% | 21.8% | 21.8% | 21.7% | 23.5% | 22.1% | 22.4% | 0.177 |
| Renal failure | 5.1% | 12.3% | 20.6% | 20.9% | 24.0% | 24.0% | 27.6% | 31.1% | 31.1% | 31.4% | < 0.001 |
| Dementia | 4.4% | 4.0% | 3.5% | 3.9% | 3.7% | 3.3% | 3.1% | 3.0% | 3.3% | 3.7% | < 0.001 |
| Cancer | 4.1% | 4.0% | 4.2% | 4.2% | 4.2% | 3.6% | 4.2% | 4.3% | 4.3% | 4.6% | < 0.001 |
| Disease severity indices | |||||||||||
| CHA2DS2VASC score | 2.7 | 2.7 | 2.5 | 2.6 | 2.8 | 2.8 | 2.8 | 2.6 | 2.8 | 2.8 | < 0.001 |
| CCI ≥ 2 | 41.8 | 45.3 | 49.8 | 49.9 | 52.3 | 51.8 | 54.4 | 57.2 | 58.1 | 58.8 | < 0.001 |
| Anticoagulation rates | |||||||||||
| Women | 8.0 | 9.1 | 11.1 | 11.9 | 14.7 | 16.2 | 17.2 | 17.7 | 18.5 | 19.9 | < 0.001 |
| Men | 8.9 | 9.7 | 11.7 | 12.4 | 15.4 | 17.5 | 18.9 | 19.2 | 19.9 | 21.6 | < 0.001 |
*The database stopped mentioning specific age from 2012 to 2014. AF: atrial fibrillation; AHRQ: Agency for Health Care Quality and Research; CAD: cardiovascular diseases; CCI: Charlson's comorbidity index; CHF: congestive heart failure.