Table 3.
Colonization and transmission of Staphylococcus aureus by study
| US (N = 139) | NL (N = 61) | AU (N = 96) | Pooled (N = 296) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n | % | n | % | n | % | P | n | % | |
| S. aureus colonization in index patients | |||||||||
| Colonized with S. aureus | 37* | 27 | 41* | 67 | 44 | 46 | <0·001 | 122 | 41 |
| Colonized with MRSA | 22* | 16 | 38* | 62 | 25 | 26 | <0·001 | 85 | 29 |
| Colonized with MSSA | 15 | 11 | 3 | 5 | 19 | 20 | 0·06 | 37 | 13 |
| S. aureus colonization in non-index HHMs | |||||||||
| Colonized with S. aureus | 89 | 64 | 23 | 38 | 52 | 54 | <0·01 | 164 | 55 |
| Colonized with MRSA | 39 | 28 | 13 | 21 | 24 | 25 | 0·59 | 76 | 26 |
| Colonized with MSSA | 63 | 45 | 12* | 20 | 39 | 41 | <0·01 | 114 | 39 |
| S. aureus transmission of the clinical isolate | |||||||||
| ⩾1 non-index HHM colonized with the clinical strain | 37 | 27 | 13 | 21 | 17 | 18 | 0·27 | 67 | 23 |
MRSA, Methicillin-resistant Staphylococcus aureus; MSSA, methicillin-susceptible Staphylococcus aureus; HHM, household member.
P value refers to test for heterogeneity between studies. χ2 tests were used for categorical variables and ANOVA for continuous variables.
*
Indicates standardized residuals are >1·96 or <–1·96, thus indicating which specific study is accounting for observed heterogeneity between studies.