Sensitivity and specificity of the method used for ascertainment of healthcare-associated infections in the second Slovenian national prevalence survey
, , and | Jul 28, 2016
About this article
Article Category: Research article
Published Online: Jul 28, 2016
Page range: 248 - 255
Received: Feb 29, 2016
Accepted: May 24, 2016
DOI: https://doi.org/10.1515/sjph-2016-0034
Keywords
© National Institute of Public Health, Slovenia
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Characteristics of patients surveyed in the University Medical Centre Ljubljana, during the Slovenian national healthcare-associated infections survey (SNHPS) in 2011, eligible for the retrospective medical chart review (RMCR), and of those included into the RMCR.
| SNHPS population eligible for RMCR | RMCR population | ||
|---|---|---|---|
| The number of patients | 1655 | 1474 | |
| Sex | |||
| Women | 809 (48.9%) | 738 (50.1%) | |
| Men | 846 (51.1%) | 736 (49.9%) | |
| Age (at the time of admission) | |||
| Median | 60 | 60 | |
| Range | 0-98 | 0-98 | |
| Mean | 55 | 55 | |
| ≤49 years | 589 (35.6%) | 508 (34.5%) | |
| 50-79 years | 807 (48.8%) | 715 (48.5%) | |
| ≥80 years | 259 (15.6%) | 251 (17.0%) | |
| McCabe index (at the time of admission) | |||
| nonfatal disease | 1298 (78.4%) | 1183 (80.3%) | |
| ultimately fatal disease | 280 (16.9%) | 239 (16.2%) | |
| rapidly fatal disease | 66 (4.0)% | 52 (3.5%) | |
| unknown | 11 (0.7%) | 0 (0.00%) | |
| The length of hospital stay (until SNHPS day) | |||
| Median | 6 | 6 | |
| Range | 0 - 367 | 0 - 323 | |
| Mean | 13 | 12 | |
| 0-3 days | 594 (35.9%) | 533 (36.1%) | |
| 4-7 days | 396 (23.9%) | 369 (25.0%) | |
| 8-14 days | 267 (16.1%) | 230 (15.6%) | |
| ≥15 days | 398 (24.0%) | 342 (23.2%) | |
| Operations last month (until SNHPS day) | |||
| Surgery | 571 (34.5%) | 574 (38.9%) | |
| No surgery | 1084 (65.5%) | 900 (61.1%) | |
Sensitivity, specificity, positive predictive value and negative predictive value of the method used for ascertaining any of the six types of healthcare-associated infections (HAIs) among 1474 patients enrolled at the University Medical Centre Ljubljana in the Slovenian national HAI prevalence survey in 2011, in comparison to the retrospective medical chart review.
| Retrospective medical chart review | ||||
|---|---|---|---|---|
| HAI | No HAI | Total | ||
| Slovenian national HAI prevalence survey | HAI | 63 | 16 | 79 |
| No HAI | 8 | 1387 | 1395 | |
| Total | 71 | 1403 | 1474 | |
Sensitivity, specificity of the method used for ascertaining any of the six types of healthcare-associated infections (HAIs) among 1655 eligible patients enrolled at the University Medical Centre Ljubljana in the Slovenian national HAI prevalence survey in 2011, in comparison to the retrospective medical chart review estimated by extrapolation of the results of the retrospective medical chart review conducted among 1474 patients.
| Retrospective medical chart review | ||||
|---|---|---|---|---|
| HAI | No HAI | Total | ||
| Slovenian national HAI prevalence survey | HAI | 77 77=PPVx96 | 19 | 96 |
| No HAI | 9 | 1550 1550=NPVx1559 | 1559 | |
| Total | 86 | 1569 | 1655 | |
Sensitivity and specificity of the method used for ascertaining six different types of healthcare-associated infections (HAIs) among 1474 patients enrolled at the University Medical Centre Ljubljana in the Slovenian national HAI prevalence survey in 2011, in comparison to the retrospective medical chart review and respective kappa coefficients by type of HAIs.
| Surveillance method | SSI | UTI | PN | LRI | BSI | CRI |
|---|---|---|---|---|---|---|
| RMCR (reference) | ||||||
| Number of HAIs | 15 | 21 | 19 | 8 | 12 | 0 |
| Prevalence of HAI episodes on the day of SNHPS | 1.0 | 1.4 | 1.3 | 0.5 | 0.8 | 0 |
| SNHPS | ||||||
| Number of HAIs | 15 | 20 | 26 | 7 | 13 | 0 |
| Prevalence of HAI episodes on the day of SNHPS | 1.0 | 1.4 | 1.8 | 0.5 | 0.9 | 0 |
| Sensitivity | 86.7 | 76.2 | 89.5 | 62.5 | 91.7 | / |
| Specificity | 99.9 | 99.7 | 99.4 | 99.9 | 99.9 | 100 |
| Kappa coefficient | 0.87 | 0.78 | 0.75 | 0.67 | 0.88 | / |