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Volume 9, Number 2—February 2003

Research

Health and Economic Impact of Surgical Site Infections Diagnosed after Hospital Discharge

Eli N. Perencevich*†Comments to Author , Kenneth E. Sands*†, Sara E. Cosgrove*, Edward Guadagnoli‡, Ellen Meara‡, and Richard Platt§†‡
Author affiliations: *Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA; †Centers for Disease Control and Prevention Eastern Massachusetts Prevention Epicenter, Boston, Massachusetts, USA; ‡Harvard Medical School, Boston, Massachusetts, USA; §Brigham and Women’s Hospital, Boston, Massachusetts, USA

Main Article

Table 3

Univariate analysis of questionnaire respondents, surgical site infections (SSIs) studya

Case-patient
N (% or SDa) (N=50) Control
N (% or SDa) (N=123) p value
HRQOL with SF-12



Preoperative MCS-12
51.7 (+/-9.6)
51.5 (+/-9.9)
0.96b
Postoperative MCS-12
47.6 (11.6)
52.4 (+/-9.2)
0.025b
Preoperative PCS-12
41.1 (+/-12.7)
45.0 (+/-10.9)
0.058b
Postoperative PCS-12
33.9 (+/-10.0)
38.7 (+/-9.8)
0.003b
Change MCS-12 with surgery
–4.1 (+/-11.0)
0.9 (+/-9.6)
0.004b
Change PCS-12 with surgery
–7.2 (+/-10.6)
–6.3 (+/-13.3)
0.67b
Additional questions



Time and productivity costs



If employed, missed work
66.7%
62.3%
0.81c
Average no. missed days at work
61.2 (+/-38.6)
57.5 (+/-40.6)
0.95c
Unable to do regular activities
60.6%
69.5%
0.39c
Missed activities, in bed >1/2 day
63.6%
41.8%
0.043c
Average no. days missed activities
49.6 (+/-41.3)
50.1 (+/-42.0)
0.90d
Additional costs



Provider made home visits
69.4%
47.5%
0.011c
Could have used home visits
30.8%
12.8%
0.068c
Used paid housekeeper
6.3%
5.8%
1.0c
Used 24-hr hotline
12.2%
5.7%
0.20c
Could have used 24-hr hotline 21.4% 8.9% 0.052c

aResults are shown as mean (+/- SD) or % of total responders , along with p value for comparison of cases with SSIs to controls without SSIs. Abbreviations used: HRQOL, Health Related Quality of Life; SF-12, Medical Outcomes Study 12-Item Short-Form Health Survey; MCS, Mental Health Component Score of SF-12; PCS, Physical Health Component Score of SF-12.

bStudent t test.

cFisher exact test.

dWilcoxon rank-sum test.

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