• Cochrane Db Syst Rev · Jan 2012

    Review Meta Analysis

    Relaxation therapy for preventing and treating preterm labour.

    • Bussarin Khianman, Porjai Pattanittum, Jadsada Thinkhamrop, and Pisake Lumbiganon.
    • Department of Obstetrics and Gynaecology, Kalasin General Hospital, Mueng District, Thailand.
    • Cochrane Db Syst Rev. 2012 Jan 1;8:CD007426.

    BackgroundPreterm birth (PTB) is a leading cause of perinatal mortality and morbidity. Although the pathogenesis of preterm labour (PTL) is not well understood, there is evidence about the relationship between maternal psychological stress and adverse pregnancy outcomes. Relaxation or mind-body therapies cover a broad range of techniques, e.g. meditation, massage, etc. There is no systematic review investigating the effect of relaxation techniques on preventing PTL and PTB. This review does not cover hypnosis as this is the subject of a separate Cochrane review.ObjectivesTo assess the effectiveness of relaxation therapies for preventing or treating PTL and preventing PTB.Search MethodsWe searched the Cochrane Pregnancy and Childbirth Group's Trials Register (14 December 2011), CENTRAL (2011, Issue 4 of 4), CINAHL (1982 to 14 December 2011) and contacted study authors for additional information.Selection CriteriaRandomized controlled trials, cluster- and quasi-randomized trials comparing relaxation techniques with usual care, no treatment or sham interventions to prevent or treat PTL.Data Collection And AnalysisTwo review authors (B Khianman (BK) and P Pattanittum (PP)) independently assessed all search results for potential inclusion studies. Disagreements were resolved by discussion with a third review author (J Thinkhamrop (JT)). Data were independently extracted onto the standardized data collection form by BK and PP and checked for accuracy. Two review authors independently assessed the risk of bias of all included studies. All differences were resolved by discussion with JT. Mean difference (MD) and its 95% confidence intervals (CI) were calculated for continuous outcomes and risk ratio (RR) and 95% CI for dichotomous data.Main ResultsEleven randomized controlled trials with a total of 833 women were included in this review. However, the results of this review are based on single studies with small numbers of participants.The majority of included studies reported insufficient information on sequence generation, allocation concealment as well as blinding. There were no included studies that assessed PTL or PTB as the primary outcome. The included studies were different in terms of intervention, practice, and time, and there were no clear coherent hypotheses.For women not in PTL, the benefits of relaxation was found in one study for maternal stress (Anxiety Stress Scale) at 26 to 29 weeks gestational age (mean difference (MD) -7.04; 95% confidence interval (CI) -13.91 to -0.17). In addition, there were some beneficial effects of relaxation including baby birthweight (MD 285.00 g; 95% CI 76.94 to 493.06); type of delivery; (vaginal delivery; risk ratio (RR) 1.52; 95% CI 1.13 to 2.04), (cesarean section; RR 0.38; 95% CI 0.19 to 0.78); maternal anxiety (MD -15.79; 95% CI -18.33 to -13.25); and stress (MD -13.08; 95% CI -15.29 to -10.87) when applying relaxation therapy together with standard treatment. For women in PTL, the results for the main outcome of PTB in the intervention and control groups from a single study were not different (RR 0.95; 95% CI 0.57 to 1.59). The MD of birthweight in grams from the fixed-effect model from two included studies was MD -5.68; (95% CI -174.09 to 162.74).Authors' ConclusionsAccording to the results of this review, there is some evidence that relaxation during pregnancy reduces stress and anxiety. However, there was no effect on PTL/PTB. These results should be interpreted with caution as they were drawn from included studies with limited quality.

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