Associated factors with low back pain in pregnant women
METHODS: This cross-sectional study was developed in Obstetrics Service of Botucatu Medical School. 781 pregnant women were interviewed between April 2011 and August 2013. All pregnant women who underwent prenatal care in the service were eligible for the study, except those who refused to participate and/or had not showed preserved cognitive capacity to answer to the evaluation tool, composed by a structured questionnaire containing general and specific clinical data and description of back pain. The analyzed covariates were age, gestational age, weight, height, body mass, parity, physical activity and oral contraceptive use. In the exploratory analysis were used univariate logistic regression models and the variables those p-values ≤0.25 were chosen for the multiple conditional logistic regression model.
RESULTS: From the 781 women interviewed, 155 (19.8%) presented suggestive complaints of back pain. In the univariate analysis, the variables “age” and “more than one pregnancy” were eligible for the multiple model. By adjusting the multiple conditional logistic regression model we observed that “more than one pregnancy” variable was the only that remained in a final model as a factor associated with low back pain (OR=1.912, CI95%=1.326-2.762).
CONCLUSIONS: Low back pain was highly prevalent among the pregnant group studied, but less than have been showed by the literature. Have had more than one previous pregnancy was the only factor associated with low back pain in this case series.