Figure 1

The prevalence of 12 different subgroups of LBP in Finnish chiropractic patients. The subgroups are ordered from the most benign to the more severe to add up to 100% (n = 977). Groups: 1 – baseline 1 week, non-persistent, intermittent; 2 – baseline 1 week, non-persistent, daily; 3 – baseline 1 week, persistent, intermittent; 4 – baseline 1 week, persistent, daily; 5 – baseline 2 weeks, non-persistent, intermittent; 6 – baseline 2 weeks, non-persistent, daily; 7 – baseline 2 weeks, persistent, intermittent; 8 – baseline 2 weeks, persistent, daily; 9 – baseline > 2 weeks, non-persistent, intermittent; 10 – baseline > 2 weeks, non-persistent, daily; 11 – baseline > 2 weeks, persistent, intermittent; 12 – baseline > 2 weeks, persistent, daily. • "base-line" refers to the duration of pain at the first visit. • "non-persistent" = altogether < 30 days in the past year. • "persistent" = altogether at least 30 days in the past year. • "intermittent" and "daily" refers to the pain pattern at the first visit.