Variables | No. (%) of E. coli-positive samples | No. (%) of E. coli-negative samples | Total | χ2 (P value) |
---|---|---|---|---|
Fecal consistency | ||||
Diarrheic | 178 (54.1%) | 151 (45.9%) | 329 | 0.651 (0.420) |
Normal | 210 (58.3%) | 150 (41.7%) | 360 | |
Age (days) | ||||
1–20 | 156 (46.3%) | 181 (53.7%) | 337 | 26.205 (< 0.001) |
21–40 | 145 (66.5%) | 73 (33.5%) | 218 | |
41–60 | 87 (64.9%) | 47 (35.1%) | 134 | |
Fecal consistency × age | 4.746 (0.093) |