From: A case-control study of mastitis: nasal carriage of Staphylococcus aureus
 | Cases N (%) | Controls N (%) |  |  |  | ||
---|---|---|---|---|---|---|---|
 | S. aureuspos | S. aureusneg | S. aureuspos | S. aureusneg | Odds Ratio | 95% CI | |
Babies 1–2 w | 41 (91) | 4 | 2 (67) | 1 | 6.67 | 0.08 | 156.3 |
Babies 3–4 w | 22 (82) | 5 | 17 (53) | 15 | 3.71 | 0.99 | 15.45 |
Babies 5–6 w | 7 (78) | 2 | 33 (59) | 23 | 2.52 | 0.42 | 26.64 |
Babies >6 w | 2 (29) | 5 | 0 (0) | 2 | Â | Â | Â |
Total | 72 (82) | 16 | 52 (56) | 41 | 3.49* | 1.38 | 8.83 |