Table 1.

Prevalence of Resistance to Trimethoprim-Sulfamethoxazole (TMP-SMX) in Patients with Various Clinical Characteristics

Characteristic	Subjects, n	TMP-SMX Resistance,* % (95% CI)
Females
All	375	14.7 (11, 19)
Healthy †	230	5.2 (3, 9)
Males
All	73	16.4 (9, 27)
Healthy †	17	11.8 (1, 36)
Age ≥65 years
All	54	24.1 (13, 38)
Healthy †	22	9.1 (1, 29)
Long-term care facility resident	14	28.6 (8, 58)
Use of urinary catheter	37	32.4 (18, 50)
Current antibiotic use	55	52.7 (39, 66)
Recent TMP-SMX use	52	55.8 (41, 69)

^*Values are expressed as percentage resistant with 95% confidence intervals.

^†Healthy patients are defined as those who do not reside in a long-term care facility, have not had recent hospitalization, do not use a urinary catheter, have no significant medical disorders, and are not taking antibiotics.