Organ systems with infections in three periods (1997–1999, 2000–2002 and 2003–2005)
| Organ system of infection | 2000–2002 vs 1997–1999, OR (99% CI) | 2003–2005 vs 1997–1999, OR (99% CI) | Per cent of total number of infections |
| Vestibulocochlear organ | – | 0.45 (0.02 to 10.77) | 0.1 |
| Circulatory tract | 1.24 (0.81 to 1.89) | 1.56 (1.05 to 2.31) | 11.7 |
| Digestive tract | 1.12 (0.70 to 1.81) | 0.99 (0.62 to 1.60) | 7.0 |
| Endocrine system | – | – | 0.1 |
| Genital tract | 0.94 (0.26 to 3.43) | 1.42 (0.45 to 4.48) | 1.0 |
| Skin/subcutis (including breast) | 1.72 (0.97 to 3.04) | 1.32 (0.73 to 2.36) | 5.0 |
| Nervous system | 1.14 (0.16 to 8.19) | 0.98 (0.14 to 7.08) | 0.4 |
| Visual system | 1.15 (0.16 to 8.30) | 0.49 (0.05 to 5.17) | 0.3 |
| Respiratory tract | 1.06 (0.75 to 1.50) | 1.21 (0.87 to 1.68) | 14.9 |
| Urinary tract | 0.74 (0.53 to 1.05) | 1.08 (0.80 to 1.46) | 15.4 |
| Other/non-specified tract | 1.23 (0.96 to 1.56) | 1.65 (1.32 to 2.06) | 44.1 |
| All infections | 1.05 (0.89 to 1.25) | 1.32 (1.13 to 1.54) | 100 |