Table 1.
Source and severity of infection in cases and controls
| Variables | Number (%) of cases (n = 43) | Number (%) of controls (n = 358) | P‐valuea |
|---|---|---|---|
| Primary source of infection | |||
| Genital tract | 19 (44) | 110 (31) | 0.074 |
| Other or unclear | 24 (56) | 248 (69) | |
| Admission to intensive care unit (Level 3) b | |||
| No | 10 (23) | 249 (70) | <0.001 |
| Yes | 32 (74) | 108 (30) | |
| Missing | 1 (2) | 1 (0) | |
| Highest lactate >2 mmol/l | |||
| No | 4 (9) | 86 (24) | <0.001 |
| Yes | 31 (72) | 62 (17) | |
| Missing or not measured | 8 (19) | 210 (59) | |
| Highest lactate >4 mmol/l | |||
| No | 13 (30) | 126 (35) | <0.001 |
| Yes | 22 (51) | 22 (6) | |
| Missing | 8 (19) | 210 (59) | |
a
Calculated using chi‐square test for difference in proportions.
b
Level 3 care refers to patients requiring advanced respiratory support or basic respiratory support and support for at least two organ systems, as classified by the Department of Health (2000).