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JOURNAL ARTICLE
META-ANALYSIS
RESEARCH SUPPORT, U.S. GOV'T, P.H.S.
SYSTEMATIC REVIEW
Treatment outcomes for squamous intraepithelial lesions.
International Journal of Gynaecology and Obstetrics 2000 January
OBJECTIVE: To assess the effectiveness of cone biopsy, cryotherapy, laser ablation and the loop electrosurgical procedure in the treatment of squamous intraepithelial lesions.
METHOD: Systematic review of randomized controlled trials in subjects who underwent treatment of low- and high-grade squamous intraepithelial lesions with these modalities. Main outcome measures included the following: percent resolution and persistence of a lesion and notable complications for each procedure.
RESULT: Pooled rates of resolution for low-grade, high-grade, or combined squamous intraepithelial lesions were similar across the different treatment modalities (range 85.2-94.7%), with substantial overlap among the 95% confidence intervals. Significant hemorrhage occurred most frequently in subjects who received cone biopsy (4.6%) (95% CI: 2.15, 6.99), followed by laser ablation (1.75%) (95% CI: 0.70, 2.81), and LEEP (1.35%) (95% CI: 0.24, 2.47). No hemorrhages were reported among subjects who received cryotherapy. Study sample sizes were relatively small. There were no reported cases of progression to invasive cancer, but duration of follow-up (median follow-up time for all eligible studies = 12 months) was not sufficient to evaluate long-term outcomes.
CONCLUSIONS: There were no substantive differences in outcomes regarding persistence and resolution in the treatment of squamous intraepithelial lesions for subjects receiving cone biopsy, cryotherapy, laser ablation, or LEEP.
METHOD: Systematic review of randomized controlled trials in subjects who underwent treatment of low- and high-grade squamous intraepithelial lesions with these modalities. Main outcome measures included the following: percent resolution and persistence of a lesion and notable complications for each procedure.
RESULT: Pooled rates of resolution for low-grade, high-grade, or combined squamous intraepithelial lesions were similar across the different treatment modalities (range 85.2-94.7%), with substantial overlap among the 95% confidence intervals. Significant hemorrhage occurred most frequently in subjects who received cone biopsy (4.6%) (95% CI: 2.15, 6.99), followed by laser ablation (1.75%) (95% CI: 0.70, 2.81), and LEEP (1.35%) (95% CI: 0.24, 2.47). No hemorrhages were reported among subjects who received cryotherapy. Study sample sizes were relatively small. There were no reported cases of progression to invasive cancer, but duration of follow-up (median follow-up time for all eligible studies = 12 months) was not sufficient to evaluate long-term outcomes.
CONCLUSIONS: There were no substantive differences in outcomes regarding persistence and resolution in the treatment of squamous intraepithelial lesions for subjects receiving cone biopsy, cryotherapy, laser ablation, or LEEP.
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