Table 3.
All | Excluding cases diagnosed within 2 years after recruitment and matched controls | |||||
---|---|---|---|---|---|---|
| ||||||
No. sero-positive | Cases n (%) | Controls n (%) | Matched OR* (95% CI) | Cases n (%) | Controls n (%) | Matched OR* (95% CI) |
All | ||||||
0–3 | 29 (12.8) | 114 (25.3) | 1.00 (Reference) | 17 (10.8) | 85 (26.9) | 1.00 (Reference) |
4–5 | 141 (62.4) | 273 (60.5) | 2.08 (1.31, 3.30) | 105 (66.5) | 188 (59.5) | 2.79 (1.56, 4.96) |
6 | 56 (24.8) | 64 (14.2) | 3.49 (2.00, 6.11) | 36 (22.8) | 43 (13.6) | 4.16 (2.08, 8.32) |
P for trend | <0.0001 | <0.0001 |
odds ratios from a conditional logistic regression model, cases and controls matched on age (within 2 years), date (within 30 days) and time (morning or afternoon) of sample collection, time interval since last meal (within 2 hours), and antibiotic use in the past week (yes/no).