Fig. 1From: Prevalence of chronic low back pain and its associated factors in the general population of South Korea: a cross-sectional study using the National Health and Nutrition Examination SurveysFlow diagram of the inclusion and exclusion of participants from the 2007, 2008, and 2009 Korea National Health and Nutrition Examination Surveys (KNHANES IV-1, IV-2, and IV-3, respectively). LBP, low back painBack to article page