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Mean VC, 95% CI, decrease in percent in relation to self-rated pain when moving from lying to sitting (n = 107, NRS 0–3.0 n = 52, NRS 3.1–7.0 n = 49, NRS 7.1–10.0 n = 6). NRS: numeric rating scale, 0 = no pain, 10 = the worst imaginable pain, VC: vital capacity, P = 0.003 between all groups.
