Association of low back pain with self-reported risk factors among patients seeking physical therapy services.

BACKGROUND AND PURPOSE

This study investigated the magnitude of association between low back pain (LBP) and self-reported factors thought to increase the risk of LBP.

SUBJECTS AND METHODS

Questionnaires were completed by 150 patients who were receiving physical therapy for LBP and by 138 patients who were being treated for other reasons. The solicited information was used to estimate odds ratios and 95% confidence intervals for the LBP-risk factor association.

RESULTS

Low back pain was positively associated with smoking status, pregnancy, industrial vibration exposure, and time spent in a car (odds ratios > or = 2.21). Daily lifting, body mass index, activity level, and time sitting or standing showed at most a weak positive association with LBP. Comparisons with estimated associations from other studies were made.

CONCLUSION AND DISCUSSION

Data from this study support a statistically significant association between LBP and some factors found in other research to increase the risk of LBP. Study findings may have implications for targeting at-risk groups for back care education or intervention programs.