Comparison of Urine Culture Results Across Three Patient Groups
| Characteristic | Uncomplicated UTI (n = 68) | Uncomplicated Elders (n = 59) | Complicated Elders (n = 47) | |||
|---|---|---|---|---|---|---|
| N (%) | 95% CI | N (%) | 95% CI | N (%) | 95% CI | |
| UC&S testing ordered | 52 (76) | 66–87* | 44 (75) | 83–86* | 37 (79) | 67–90* |
| Mixed flora/contamination present in urine culture | n = 52 | n = 44 | n = 37 | |||
| Yes | 11 (21) | 12 (27) | 9 (24) | |||
| No | 38 (73) | 27 (61) | 26 (70) | |||
| No growth | 3 (6) | 5 (11) | 2 (5) | |||
| Type of pathogens grown | n = 38 | n = 27 | n = 26 | |||
| E. coli | 35 (92) | 79–98 | 22 (81) | 62–94 | 14 (54) | 33–73 |
| E. coli only | 32 | 19 | 14 | |||
| E. coli and other bacteria | 3 | 3 | 0 | |||
| Other bacteria only | 3 (8) | 2–21 | 5 (19) | 6–38 | 12 (46) | 27–67 |
| E. coli sensitivity to TMP/SMX | 33 (94) (n = 35) | 81–99* | 19 (86) (n = 22) | 65–97* | 12 (86) (n = 14) | 57–98* |
* 95% CI show the proportion of patients who had urine culture and sensitivity testing ordered that were calculated using normal theory methods; all other 95% CIs were calculated using an exact method of obtaining a confidence interval for a binomial parameter.
UTI, urinary tract infection; UC&S, of urine culture and sensitivity; TMP/SMX, trimethoprim/sulfamethoxazole.