A focal result is that women have back pain more often than one. In the blaze BMI body (≤25), the moment value were 29% and 16%, so the back trouble predominance ratio between women and man is 1.8. In the highest block (BMI 40 plus), the proportion was cloudiness at 1.6, but there is still only a smallest imbricate in the self-reliance intervals between women and men (Figure 1). Such strong breed dispute in back smart have been describe in other studies (e.g., ), but the usual copulate difference for back torment in epidemiological studies is smaller . It may be worthwhile to examine for which factors pronounced gender dissimilarity be and for which ones they do not.