CLINICAL TRIAL
JOURNAL ARTICLE
MULTICENTER STUDY
RANDOMIZED CONTROLLED TRIAL
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Antibiotic therapy in preterm premature rupture of membranes: Are seven days necessary? A preliminary, randomized clinical trial.

OBJECTIVE: The purpose of this study was to determine whether 3 days of broad-spectrum antibiotic therapy, which is intended to prolong latency in patients with preterm premature rupture of membranes, is comparable to 7 days of therapy.

STUDY DESIGN: Patients with preterm premature rupture of membranes at three separate study sites were asked to participate in this intent-to-treat, prospective, randomized trial. They were assigned randomly to either 3 or 7 days of ampicillin-sulbactam (3 g intravenously every 6 hours). The primary outcome of interest was the latency period from membrane rupture to delivery.

RESULTS: Forty-two individuals were enrolled in each group. No difference was noted in the latency interval between the two groups (3 days, 214 +/- 225 hours, vs 7 days, 229 +/- 218 hours). A significantly higher number of patients in the 3-day group completed therapy (80.1% vs 47.6%, P =.003). No other parameters were significantly different between the two groups. No adverse events or trends were noted in either group.

CONCLUSION: There appears to be no difference in the latency period between 3 and 7 days of ampicillin-sulbactam antibiotic therapy. More patients are needed to exclude a type II error.

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