Figure 1

Results of self-assessment of pain on 0 to 100 visual analogue scale (VAS): values are means, with standard deviations in bars. (a) Overall pain score; (b) severity of headaches during the last week; (c) severity of back pain during the last week; (d) severity of shoulder pain during the last week; (e) interference of overall pain with ability to do daily activities during the past week; (f) time with pain while awake.