Table 2.
Infection-related medical resource use and expenditures over a 7-month period, among patients receiving IVIG and experiencing an infection
| Characteristic | Estimate |
|---|---|
| N | 490 |
| Inpatient hospitalizations | |
| Number with a hospitalization (%) | 124 (25.3%) |
| Number of hospitalizations among those hospitalized | |
| Mean (± SD) | 1.38 (0.80) |
| Median | 1.00 |
| IQR | 1.00–1.25 |
| Mean number of hospital days among those hospitalized | |
| N | 124 |
| Mean (± SD) | 10.85 (12.61) |
| Median | 6.50 |
| IQR | 4.00–12.00 |
| Average expenditures among those hospitalized | |
| Mean (± SD) | $38,574 ($62,572) |
| Median | $15,667 |
| IQR | $9,198–$39,463 |
| ER visits | |
| Number with an ER visit (%) | 22 (4.5%) |
| Number of ER visits among those with an ER visit | |
| Mean (± SD) | 6.50 (3.00) |
| Median | 6.00 |
| IQR | 4.00–8.50 |
| Average expenditures among those with an ER visit | |
| Mean (± SD) | $899 ($940) |
| Median | $586 |
| IQR | $239–$1,127 |
| Outpatient visits | |
| Number with an office visit (%) | 440 (89.8%) |
| Number of office visits among those with an office visit | |
| Mean (± SD) | 2.96 (4.55) |
| Median | 2.00 |
| IQR | 1.00–3.00 |
| Average expenditures among those with an office visit | |
| Mean (± SD) | $1,460 ($5,353) |
| Median | $229 |
| IQR | $103–$649 |
| Other resource usea | |
| Number with other resource use (%) | 70 (14.3%) |
| Average expenditures among those with other resource use | |
| Mean (± SD) | $6,182 ($17,472) |
| Median | $628 |
| IQR | $184–$1,628 |
| Total average medical expenditures | |
| N | 490 |
| Mean (± SD) | $11,925 ($37,498) |
| Median | $444 |
| IQR | $129–$7,912 |
Notes:
Other resource use includes nonoffice visit outpatient resource use consisting of: assisted living facility, skilled nursing facility, independent clinic, state/local public health clinic, and rural health clinic, among miscellaneous care types. Total infection-related medical expenditures were determined by the presence of an infection diagnosis code (primary or any diagnosis) on any medical claim, and represents the expenditures associated with these infection-related claims. This estimate does not reflect a cost estimate per infection episode.
Data source: Truven Health Analytics MarketScan® Commercial Research Database, January 1, 2008–September 30, 2010. All reported expenditures are 2010 US dollars.
Abbreviations: ER, emergency room; IQR, interquartile range; IVIG, intravenous immunoglobulin (therapy); SD, standard deviation.