Table 3.
Characteristic | Number with characteristic | Number (%) hospitalized | OR (95% CI) | P value* |
---|---|---|---|---|
STEC serogroup | ||||
O157 | 845 | 432 (51·1) | 2·2 (1·70–2·84) | <0·0001 |
Non-O157 | 369 | 119 (32·3) | 1·0 | – |
Shiga toxin profile | ||||
stx1 | 358 | 117 (32·7) | 1·0 | – |
stx2 | 331 | 163 (49·2) | 2·0 (1·47–2·72) | <0·0001 |
stx1, stx2 | 508 | 255 (50·2) | 2·1 (1·57–2·75) | <0·0001 |
Clinical symptoms | ||||
Diarrhoea only | 328 | 87 (26·5) | 1·0 | – |
Bloody diarrhoea | 954 | 489 (51·3) | 2·9 (2·21–3·84) | <0·0001 |
Age group (years) | ||||
≤10 | 305 | 107 (35·1) | 1·0 | – |
11–59 | 839 | 373 (44·5) | 1·5 (1·13–1·94) | 0·004 |
≥60 | 197 | 126 (64·0) | 3·3 (2·26–4·77) | <0·0001 |
Gender | ||||
Female | 714 | 328 (45·9) | 1·1 (0·86–1·32) | 0·58 |
Male | 617 | 274 (44·4) | 1·0 | – |
Season | ||||
Winter and spring | 395 | 180 (45·6) | 1·0 | 0·90 |
Summer and autumn | 954 | 431 (45·2) | 1·0 (0·80–1·29) | – |
OR, Odds ratio; CI, confidence interval.
* Likelihood ratio χ2 test.