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) | / |