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Table 4 MRC-SS Bland-Altman results from part one (n = 29)

From: A new two-tier strength assessment approach to the diagnosis of weakness in intensive care: an observational study

Testing procedure MRC-SS mean ± SD ICU-AW incidence n (%)    
Assessor 1 Assessor 2 Assessor 1 Assessor 2 P value Mean diff LOA (+) LOA (−)
Isometric six-point 48 ± 9 48 ± 9 12 (41%) 14 (48%) 0.74 −0.27 9.04 8.48
Through range six-point 48 ± 8 45 ± 9 15 (52%) 17 (59%) 0.02 2.55 12.99 7.88
Through range four-point 26 ± 6 26 ± 6 9 (31%) 12 (41%) 0.23 0.48 4.62 3.66
Isometric four-point 27 ± 6 27 ± 6 10 (35%) 10 (35%) 0.85 −0.10 5.43 5.63
  1. MRC-SS, Medical Research Council sum score; SD, standard deviation; ICU-AW, intensive care unit-acquired weakness; n, number; mean diff, mean difference; LOA, limit of agreement; +, positive; , negative.