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Table 1

Proportions of participants in the various LBP definitions

41 year n = 41245 years n = 34849 years n = 293
Sexmale n (%)198 (48.1%)159 (46.1%)136 (46.4%)
Low back pain definitions % [95% confidence interval]past year69%[64;73]68%[63;73]70%[64;75]
past month42%[38;47]48%[43;54]41%[35;46]
>30 days/year25%[21;29]26%[21;30]24%[19;28]
seeking care* 28%[23;32] 29%[24;34] 36%[30;41]
non-trivial18%[15;22]20%[16;24]20%[15;24]
*p = 0.0044 (test for trend)