| History of UTI | Yes No |
| Back Pain | Yes No |
| Microscopic pyuria (>15 WBC/hpf) | Yes No |
| Microscopic hematuria (>5 RBC/hpf) | Yes No |
| Bacteriuria (>"few" bacteria) | Yes No |
Wigton, et al., developed a clinical tool to predict which women with suspected Urinary Tract Infection (UTI) actually will end up with positive urine cultures.
Utilizing this rule can help to stratify patients.
This clinical tool was derived in three stages, including a pilot study looking at 89 variables, then a training set utilizing 30 variables and a validation set using 30 variables. Over 700 patients were entered into these various stages.
It was found that 5 items allowed for prediction:
Each of these items area weighted similarly to score 1 point if present. Each additional factor present increased the likelihood of a positive culture. The authors felt that 2 or more points should result in empiric treatment for UTI and culture may not add additional data (unless needed for another purpose than diagnosis of presence of a UTI).
| Points | % with positive culture |
|---|---|
| 0 | 0% |
| 1 | 25% |
| 2 | 56% |
| 3 | 76% |
| 5-Apr | 86% |
Reference:
Wigton RS, Hoellerich VL, Ornato JP, et al. Use of clinical findings in the diagnosis of urinary tract infection in women. Arch Intern Med. 1985;145(12):2222-7.