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5种不同方法治疗尿路感染的疗效:一项随机对照试验

Effectiveness of five different approaches in management of urinary tract infection: randomised controlled trial
Little P, Moore MV, Turner S   |    2010/8/19 14:02:24   | 
BMJ  |   2010   |          View at Publisher
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Objective:
To assess the impact of different management strategies in urinary tract infections.

Design:
Randomised controlled trial.

Setting:
Primary care.

Participants:
309 non-pregnant women aged 18-70 presenting with suspected urinary tract infection.

Intervention:
Patients were randomised to five management approaches: empirical antibiotics; empirical delayed (by 48 hours) antibiotics; or targeted antibiotics based on a symptom score (two or more of urine cloudiness, urine smell, nocturia, or dysuria), a dipstick result (nitrite or both leucocytes and blood), or a positive result on midstream urine analysis. Self help advice was controlled in each group.

Main Outcome Measures:
Symptom severity (days 2 to 4) and duration, and use of antibiotics.

Results:
Patients had 3.5days of moderately bad symptoms if they took antibiotics immediately. There were no significant differences in duration or severity of symptoms (mean frequency of symptoms on a 0 to 6 scale: immediate antibiotics 2.15, midstream urine 2.08, dipstick 1.74, symptom score 1.77, delayed antibiotics 2.11; likelihood ratio test for the five groups P=0.177). There were differences in antibiotic use (immediate antibiotics 97%, midstream urine 81%, dipstick 80%, symptom score 90%, delayed antibiotics 77%; P=0.011) and in sending midstream urine samples (immediate antibiotics 23%, midstream urine 89%, dipstick 36%, symptom score 33%, delayed antibiotics 15%; P<0.001). Patients who waited at least 48 hours to start taking antibiotics reconsulted less (hazard ratio 0.57 (95% confidence interval 0.36 to 0.89), P=0.014) but on average had symptoms for 37% longer than those taking immediate antibiotics (incident rate ratio 1.37 (1.11 to 1.68), P=0.003), particularly the midstream urine group (73% longer, 22% to 140%; none of the other groups had more than 22% longer duration).

Conclusion:
All management strategies achieve similar symptom control. There is no advantage in routinely sending midstream urine samples for testing, and antibiotics targeted with dipstick tests with a delayed prescription as backup, or empirical delayed prescription, can help to reduce antibiotic use.

Study Registration:
National Research Register N0484094184 ISRCTN: 03525333.
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