TABLE I.
Total and Per-Patient Health Care Utilization for 2008/2009 and 2009/2010 Influenza Seasons by Type and Location of Service
| May 2008–April 2009 Influenza Season | May 2009–April 2010 Influenza Season | Percentage increase* (e/b) (%) | p-value** | |||||
|---|---|---|---|---|---|---|---|---|
| No. of Patients (a) | Total (b) | Mean per patient (c) | No. of Patients (d) | Total (e) | Mean per patient (f) | |||
| Military Facilities | ||||||||
| Office Visits | 6,237 | 6,798 | 1.09 | 31,733 | 36,172 | 1.14 | 532.1 | <0.05 |
| Emergency Department Visits | 1,994 | 2,058 | 1.03 | 17,001 | 17,582 | 1.03 | 854.5 | 0.576 |
| Inpatient Dispositions | 202 | 205 | 1.01 | 1,020 | 1,049 | 1.03 | 513.0 | 0.162 |
| Inpatient Bed Days | 202 | 1,111 | 5.50 | 1,020 | 3,699 | 3.63 | 333.1 | 0.003 |
| Civilian Facilities | ||||||||
| Office Visits | 28,295 | 33,082 | 1.17 | 85,911 | 107,397 | 1.25 | 324.6 | <0.05 |
| Emergency Department Visits | 5,573 | 6,074 | 1.09 | 27,642 | 31,845 | 1.15 | 524.3 | <0.05 |
| Inpatient Admissions | 955 | 1,012 | 1.06 | 2,526 | 2,877 | 1.14 | 284.2 | <0.05 |
| Inpatient Bed Days | 955 | 8,039 | 8.42 | 2,526 | 17,139 | 6.79 | 213.2 | 0.003 |
| Antiviral Prescriptions | ||||||||
| Recommended Antivirals | 87,368 | 107,889 | 1.23 | 276,892 | 337,939 | 1.22 | 313.2 | 0.004 |
| Other Antiviral Therapy | 4,016 | 8,083 | 2.01 | 3,266 | 6,838 | 2.09 | 84.6 | 0.797 |
*
Percentage increase in influenza-related services in 2009/2010 season relative to the 2008/2009 season.
**
Statistical significance difference in 2008/2009 season and 2009/2010 season, 2-sided t-test.