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Table 1 (abstract P12) Psychometric properties of scar rating scales based on classical test theory

From: 5th National Congress of the Italian Society of Physiotherapy

Authors (year) Scar Types Sample Size (n) Scale Internal Consistency (Cronbach alpha) Convergent Validity Reliability
Beausang et al. (1998) Excisioned scars 69 MSS / Correlation with histology (p<0.001) Intra-observer: variation between 8% and 15%
Inter-observer (Spearman): 0.87 (range 0.83-0.89)
van de Kar et al. (2005) Linear surgical scars 100 POSAS (v.2.0) 0.86 [OSAS]; 0.90 [PSAS] / Inter-observer (ICC): 0.88 (95%CI 0.84-0.91) [OSAS];
Test-retest (ICC): 0.94 (95%CI 0.91-0.96) [PSAS]
Truong et al. (2005) Linear scars from breast and axillary surgery 106 VSS 0.79 Agreement with patient rating of scar pliability (p=0.01) and color (p=0.001); no correlation with patients’ satisfaction (p=0.12) Inter-observer (ICC): 0.64 (95%CI 0.51-0.74)
Bock et al. (2006) Keloids, hypertrophic scars 100 Bock QoL Psychological scale: 0.86-0.88; Correlation between Psychological and Physical scales (Pearson): 0.20-0.22 Test-retest (Pearson): Psychological scale: 0.96; Physical scale: 0.94
Physical scale: 0.77-0.78
Singer et al. (2007) Scars from surgical incisions and traumatic lacerations 50 SBSES / Correlation with VAS for cosmetic appearance (Spearman): 0.75-0.92 Inter-observer (Spearman): 0.73-0.85
Truong et al. (2007) Linear scars from breast surgery 31 VSS 0.71 Correlation with OSAS (p<0.001); no correlation with PSAS (p=0.18) Inter-observer (ICC): 0.54 (95%CI 0.33-0.73)
POSAS (v1.0) 0.74 [OSAS]; 0.77 [PSAS] OSAS: correlations with VSS (p<0.001) and with PSAS (p=0.04) Inter-observer (ICC): 0.33 (95%CI 0.11-0.56) [OSAS]
Balci et al. (2009) Keloids, hypertrophic scars 48 DLQI 0.78 / /
Deslauriers et al. (2009) Scars from orthopaedic surgery 53 PSAS-Fr 0.98 / Test-retest (ICC): 0.96 (range 0.78-0.96)
Durani et al. (2009) Scars from cardiothoracic and varicose vein surgery, nevi excision, scar revision 372 PSAQ All subscales: 0.73-0.94 Correlations with: clinician VAS (p<0.01) except for Satisfaction with symptoms subscale; patient VAS (p<0.01); MSS (p<0.01) except for Satisfaction with symptoms subscale Test-retest (ICC): Cardiothoracic and vein groups 0.71-0.86; Nevi excision group 0.48-0.86; Scar revision group 0.37-0.74
Brown et al. (2010) Normal, depressed, stretched, and raised scars 103 PRISM QoL: 0.92-0.93; Symptoms: 0.84-0.85 Correlations between QoL and HADS, QoL and GWBI (all p<0.01); between Symptoms and HADS (p<0.05), and Symptoms and GWBI (p<0.01) Test-retest (ICC): QoL: 0.89; Symptoms: 0.83
Ferriero et al. (2010) Adherent post-surgical scars 25 VSS / Correlation with Adheremeter severity index (p<0.05) /
Nicholas et al. (2012) Keloid scars 41 VSS 0.65 Correlation with OSAS (p<0.01) Inter-observer (ICC): 0.38 (95%CI 0.19-0.57)
No correlation with PSAS (p=0.29)
POSAS (v.2.0) 0.86 [OSAS]; 0.82 [PSAS] OSAS: correlation with VSS (p<0.01); no correlation with PSAS (p=0.34) Inter-observer (ICC): 0.66 (95%CI 0.51-0.79) [OSAS]
Economopoulos et al. (2012) Scars from thyroid and parathyroid surgery 696 PSAQ Appearance: 0.79; Consciousness: 0.85 / Test-retest (ICC; sample size:70): Appearance 0.79 (95%CI 0.69-0.87); Consciousness 0.81 (95%CI 0.71-0.88)
Choi et al. (2014) Linear, linear bulging, hypertrophic, adhesive scars 97 DLQI / Correlation with symptoms (p<0.05), but not with VSS (p=0.769), type of scar (p=0.724), time elapsed after surgery (p=0.812) /
  1. Legend: VSS Vancouver Scar Scale, DLQI Dermatology Life Quality Index, MSS Manchester Scar Scale, POSAS Patient and Observer Scar Assessment Scale, Bock QoL Bock Quality of Life questionnaire, SBSES Stony Brook Scar Evaluation Scale, PRISM Patient-Reported Impact of Scars Measure, PSAQ Patient Scar Assessment Questionnaire, HADS Hospital Anxiety and Depression Scale, GWBI General Well-Being Index, VAS Visual Analogue Scale, ICC Intraclass Correlation Coefficient