Pregnancy Research on Osteopathic Manipulation Optimizing Treatment Effects: the PROMOTE study.

The short version

This randomized, placebo-controlled trial of 400 pregnant women, called PROMOTE, explored whether osteopathic manipulative treatment (OMT), a hands-on approach in which physicians apply guided forces to muscles and joints, eases low back pain and protects back-related function late in pregnancy. Low back pain is reported by about 70% of pregnant women, and most pain medications are not recommended during pregnancy, leaving few safe options. Pregnancy changes posture and biomechanics through ligament strain, increased muscle tension and reduced range of motion. The study also checked whether OMT reduces meconium-stained amniotic fluid, a possible sign of fetal stress. Women aged 18 to 35 in their third trimester at three Texas clinics were randomly assigned to usual prenatal care only, usual care plus OMT, or usual care plus a placebo ultrasound treatment with the machine switched off. Across seven visits from week 30 to week 39, the OMT group received about 20 minutes of treatment to the neck, back, pelvis and hips. Pain was rated on a 0-100 scale combining four pain ratings, and back-related disability was scored on the 24-item Roland-Morris questionnaire. Pain and back-related functioning differed significantly across groups (p < .001 for both). Women receiving OMT improved or stayed stable, while women receiving usual care only had worsening pain and function. OMT did not differ significantly from placebo ultrasound, and both beat usual care. Only 99 of 400 women (25%) completed all seven visits, but results were consistent among the 357 who completed at least four. Meconium staining appeared in 18.5% of 329 deliveries with data and was not linked to treatment group (p = .611). Gestational age at delivery averaged 39 weeks 2 days in every group. About 12.5% of women were reclassified as high-risk during the study (OMT 11, placebo ultrasound 19, usual care 20), with no higher likelihood in any group (p = .141), which the authors used as an indirect safety measure. The authors conclude that OMT mitigated pain and functional decline compared with usual care alone, but its similarity to placebo ultrasound may reflect the placebo's own touch and attention. They describe OMT as a safe, effective add-on for third-trimester back pain. Baseline characteristics were similar across groups except pre-pregnancy BMI, which was lower in the OMT group. Limitations include the large share of women who missed visits, the lack of an attention-matched usual-care arm, and effect sizes that the stored text does not report.

Key findings

• In the PROMOTE trial of 400 pregnant women, osteopathic manipulative treatment (OMT, hands-on technique applied to muscles and joints) was compared with a placebo ultrasound treatment and with usual prenatal care alone during the third trimester.
• Back pain and back-related disability differed significantly across groups (p < .001): they worsened with usual care alone but improved or stayed stable with OMT.
• OMT did not differ significantly from the placebo ultrasound, which the authors suggest may have acted as a more active treatment than intended.
• Conversion to high-risk pregnancy status occurred in 12.5% of women (11 in OMT, 19 in placebo, 20 in usual care) with no higher likelihood in any group (p = .141), and meconium staining of amniotic fluid was unrelated to treatment (p = .611).
• Only 99 of 400 women (25%) completed all seven visits, and the stored text does not report effect sizes.

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