Absence of low back pain to demarcate an episode: a prospective multicentre study in primary care

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Published online 2016 Feb 18. doi: 10.1186/s12998-016-0085-z

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Table 1

Descriptive data of the study population

Variable	Dropouts	Excluded	Study sample
Number of subjects	18	22	222
Age in years, mean (SD^a)	43 (11)	41 (14)	44 (11)
Sex distribution, %
Men	56	64	50
Women	44	36	49
Main type of occupation, %:
Sitting	38	29	43
Standing	13	19	22
Varying	37	28	28
Heavy	12	24	7
Pain intensity 0–10, mean (SD^a)	3.9 (3.1)	5.4 (2.3)	4.3 (2.2)
Presence of leg pain, %	59	47	49
Pain duration >30 days, %	33	57	59

^a SD standard deviation