Figure 2From: Pain in the lumbar, thoracic or cervical regions: do age and gender matter? A population-based study of 34,902 Danish twins 20–71 years of age The proportions of Danish twin individuals aged 20 to 71 who reported to have had low back pain ever and those who reported to have had low back pain in the past year by age and gender (N = 34,674).Back to article page