Table 3.
O. formigenes among patients with recurrent CaOx kidney stones and control subjects according to antibiotic use
| Antibiotic Use | Case Patients
|
Control Subjects
|
Crude OR | Multivariate OR (95% CI)a | ||
|---|---|---|---|---|---|---|
| O. formigenes/Total | % | O. formigenes/Total | % | |||
| Antibiotics that affect O. formigenes (ever) | 24/168 | 14 | 47/162 | 29 | 0.4 | 0.4 (0.2 to 0.7) |
| Other antibiotics in previous 5 yrb | 13/64 | 20 | 18/39 | 46 | 0.3 | 0.1 (0.02 to 0.5) |
| No antibioticsc | 5/15 | 33 | 34/58 | 59 | 0.4 | 0.4 (0.08 to 2.2) |
a
OR based on unconditional logistic regression with the following factors in the model: O. formigenes, age, gender, region, education, race, dietary oxalate, and family history of stones.
b
No antibiotics that affect O. formigenes at any time.
c
No antibiotics that affect O. formigenes at any time and no other antibiotics in previous 5 yr. OR for participants who took no antibiotics in previous 3 mo: 0.4 (0.3 to 0.8), based on 27 of 125 case patients and 95 of 244 control subjects.