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加巴喷丁无益于缓解女性慢性盆腔疼痛

作者:好点的电子游戏平台   时间:2020-09-29 14:10   

本期文章:《柳叶刀》:Online/在线发表

英国爱丁堡大学Andrew W Horne团队研究了加巴喷丁治疗女性慢性盆腔疼痛的疗效。2020年9月26日,该研究发表在《柳叶刀》杂志上。

慢性骨盆痛影响全球2-24%的女性,且有医学治疗指征的很少。加巴喷丁可有效治疗某些慢性疼痛。为了评估加巴喷丁治疗患有慢性盆腔痛且无明显盆腔病理的女性的疗效和安全性,研究组在英国39个医院中心进行了一项多中心、随机、双盲、安慰剂对照的试验。

2015年11月30日至2019年3月6日,研究组招募了306名18-50岁、慢性盆腔痛(伴或不伴痛经或性交困难)且持续时间至少3个月、腹腔镜检查未见明显的盆腔病理、愿意使用避孕药具的女性,将其按1:1随机分组,其中153名接受加巴喷丁治疗,153名接受安慰剂治疗,为期16周。

治疗13-16周,加巴喷丁组的平均最大疼痛数字评价量表(NRS)评分为7.1分,安慰剂组为7.4分,组间无显著差异。加巴喷丁组相对于基线平均降低了1.4分,安慰剂组平均降低了1.2分。加巴喷丁组的平均NRS疼痛评分为4.3分,安慰剂组为4.5分。加巴喷丁组相对于基线平均降低了1.1分,安慰剂组平均降低了0.9分。加巴喷丁组中严重不良事件的发生率为7%,显著高于安慰剂组(2%)。加巴喷丁组中头晕、嗜睡和视觉障碍更为常见。

结果表明,加巴喷丁治疗女性慢性盆腔疼痛并不能降低疼痛评分,且不良反应发生率较高,不建议临床采纳。

 

附:英文原文

 

Title:Gabapentin for chronic pelvic pain in women (GaPP2): a multicentre, randomised, double-blind, placebo-controlled trial

 

Author:Prof Andrew W Horne, PhD Katy Vincent, DPhil Catherine A Hewitt, MSc Lee J Middleton, MSc Magda Koscielniak, PhD Wojciech Szubert, MD et al.

 

Issue&Volume:September 26, 2020

 

Abstract: 

 

Background
Chronic pelvic pain affects 2–24% of women worldwide and evidence for medical treatments is scarce. Gabapentin is effective in treating some chronic pain conditions. We aimed to measure the efficacy and safety of gabapentin in women with chronic pelvic pain and no obvious pelvic pathology.
Methods
We performed a multicentre, randomised, double-blind, placebo-controlled randomised trial in 39 UK hospital centres. Eligible participants were women with chronic pelvic pain (with or without dysmenorrhoea or dyspareunia) of at least 3 months duration. Inclusion criteria were 18–50 years of age, use or willingness to use contraception to avoid pregnancy, and no obvious pelvic pathology at laparoscopy, which must have taken place at least 2 weeks before consent but less than 36 months previously. Participants were randomly assigned in a 1:1 ratio to receive gabapentin (titrated to a maximum dose of 2700 mg daily) or matching placebo for 16 weeks. The online randomisation system minimised allocations by presence or absence of dysmenorrhoea, psychological distress, current use of hormonal contraceptives, and hospital centre. The appearance, route, and administration of the assigned intervention were identical in both groups. Patients, clinicians, and research staff were unaware of the trial group assignments throughout the trial. Participants were unmasked once they had provided all outcome data at week 16–17, or sooner if a serious adverse event requiring knowledge of the study drug occurred. The dual primary outcome measures were worst and average pain scores assessed separately on a numerical rating scale in weeks 13–16 after randomisation, in the intention-to-treat population. Self-reported adverse events were assessed according to intention-to-treat principles. This trial is registered with the ISRCTN registry, ISCRTN77451762.
Findings
Participants were screened between Nov 30, 2015, and March 6, 2019, and 306 were randomly assigned (153 to gabapentin and 153 to placebo). There were no significant between-group differences in both worst and average numerical rating scale (NRS) pain scores at 13–16 weeks after randomisation. The mean worst NRS pain score was 7·1 (standard deviation [SD] 2·6) in the gabapentin group and 7·4 (SD 2·2) in the placebo group. Mean change from baseline was −1·4 (SD 2·3) in the gabapentin group and −1·2 (SD 2·1) in the placebo group (adjusted mean difference −0·20 [97·5% CI −0·81 to 0·42]; p=0·47). The mean average NRS pain score was 4·3 (SD 2·3) in the gabapentin group and 4·5 (SD 2·2) in the placebo group. Mean change from baseline was −1·1 (SD 2·0) in the gabapentin group and −0·9 (SD 1·8) in the placebo group (adjusted mean difference −0·18 [97·5% CI −0·71 to 0·35]; p=0·45). More women had a serious adverse event in the gabapentin group than in the placebo group (10 [7%] of 153 in the gabapentin group compared with 3 [2%] of 153 in the placebo group; p=0·04). Dizziness, drowsiness, and visual disturbances were more common in the gabapentin group.
Interpretation
This study was adequately powered, but treatment with gabapentin did not result in significantly lower pain scores in women with chronic pelvic pain, and was associated with higher rates of side-effects than placebo. Given the increasing reports of abuse and evidence of potential harms associated with gabapentin use, it is important that clinicians consider alternative treatment options to off-label gabapentin for the management of chronic pelvic pain and no obvious pelvic pathology.

 

DOI:https://doi.org/10.1016/S0140-6736(20)31693-7

 

Source: https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(20)31693-7/fulltext

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