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Table 5 Reliability of Payne-Martin and STAR grading scales for skin tears

From: Pilot parallel randomised controlled trial of protective socks against usual care to reduce skin tears in high risk people: ‘STOPCUTS’

  Inter-rater agreement: nurses vs. tissue viability expert (AK) Inter-scale agreement: Payne-Martin vs STAR
Payne-Martin Groups 1a, 1b, 2a, 2b and 3 STAR Groups 1a, 1b, 2a, 2b and 3 Nurse grading Tissue viability expert (AK) grading
Observed agreement 75% 74.1% 88.33% 90%
Expected agreement 66.2% 66.8% 61.67% 71.39%
Kappa +/− 95% CI 0.26 (0.02 to 0.5) 0.22 (− 0.02 to 0.46) 0.70 (0.55 to 0.84) 0.65 (0.47 to 0.84)
p 0.0118 0.0264 < 0.0001 < 0.0001