Table 2.
Risk factors for nosocomial bacteraemia analysed with multivariable Cox regression models
| Age younger than 28 days*(HR [95% CI]) | Age older than 28 days (HR [95% CI]) | |
|---|---|---|
| Nutritional status (WAZ) | ||
| >−3 | 1·00 | 1·00 |
| −3 to −4 | 1·73 (0·71–4·23) | 1·99 (1·31–3·04) |
| <−4 | 3·40 (1·60–7·26) | 1·95 (1·29–2·97) |
| Missing | 5·22 (0·93–29·4) | 1·78 (0·42–7·48) |
| Severe anaemia and transfusion | ||
| No severe anaemia, not transfused | ·· | 1·00 |
| Severe anaemia, not transfused | ·· | 1·04 (0·33–3·26) |
| No severe anaemia, transfused | ·· | 4·99 (3·39–7·37) |
| Severe anaemia, transfused | ·· | 0·62 (0·23–1·66)† |
| Time admitted | ||
| 2002–04 | 1·00 | 1·00 |
| 2005–07 | 1·87 (0·73–4·82) | 1·43 (0·93–2·20) |
| 2008–09 | 2·34 (0·89–6·14) | 2·01 (1·29–3·12) |
Severe anaemia and receipt of a blood transfusion had no significant effect in neonates and were not included in this model for this age group. WAZ=weight-for-age Z score. HR=hazard ratio.
*
Patients with missing data for blood transfusion or anaemia status on admission were excluded from this analysis.
†
Likelihood ratio test for inclusion of interaction term has p=0·015.