Health and Quality of Life Outcomes (2017) 15:247 https://doi.org/10.1186/s12955-017-0815-5 Unfortunately, the original version of this article [1] contained one error around the EQ-5D visual analogue scale (VAS) scores affecting a few patients. Table 1 Internal consistency reliability and clinical and concurrent validity of the FACT-M and MCC-specific scores in the mMCC population FACT-M Subscales and Summary scores # items Cronbach’s alpha[a] Scale structure ECOG PS (mean [SD]) EQ-5D VAS EQ-5D index Range of item-subscale correlations[b] Convergent[c]/Divergent[d] validity (% of items) 0 (n = 39) 1 (N = 31) p-value[e] Correlation[b] Correlation [b] FACT-G subscales Physical well-being (PWB) 7 0.86 0.49–0.81 100/ 57 23.21 (5.02) 20.10 (6.08) 0.0221 0.59 0.75 Social/Family well-being (SWB) 7 0.81 0.41–0.86 100/ 71 23.03 (4.78) 21.49 (5.30) 0.2065 0.19 0.24 Emotional well-being (EWB) 6 0.83 0.53–0.75 100/ 67 17.97 (4.22) 16.87 (4.95) 0.3179 0.36 0.53 Functional well-being (FWB) 7 0.87 0.49–0.82 100/ 71 17.41 (6.68) 15.48 (5.90) 0.2113 0.44 0.63 Melanoma-specific subscales Melanoma Subscale (MS) 16 0.85 0.24–0.85 75 / 31 51.64 (8.93) 49.10 (9.02) 0.2427 0.55 0.75 Melanoma surgery Scale (MSS) 8 0.84 0.15–0.81 88 / 63 26.51 (6.19) 25.58 (6.03) 0.5290 0.26 0.51 Summary scales FACT-M TOI 30 0.94 – – 92.26 (18.75) 84.68 (19.40) 0.1026 0.58 0.78 FACT-G total score 27 0.94 – – 81.62 (17.25) 73.95 (17.62) 0.0713 0.50 0.67 FACT-M total score 43 0.96 – – 133.26 (24.66) 123.04 (25.21) 0.0926 0.55 0.74 MCC-Specific scores Physical function score (PF) 6 0.88 – – 16.38 (5.67) 13.71 (5.54) 0.0519 0.52 0.72 Psychological impact score (PI) 6 0.85 – – 17.82 (4.40) 16.87 (5.18) 0.4101 0.36 0.52 MCC summary score 12 0.91 – – 34.21 (8.99) 30.58 (9.94) 0.1145 0.49 0.69 # number, ECOG PS Eastern Cooperative Oncology Group performance score, MCC Merkel cell carcinoma, PAS PRO analysis set, SD Standard deviation, TOI Trial Outcome Index [a] Recommended threshold α > 0.7; [b] Pearson correlation coefficients; [c] % of items correlated with its own dimension ≥0.4; [d] % of items correlated with its own dimension higher that the correlation with any other dimension; [e] p-value from t-test of score between the two ECOG performance status groups at baseline Internal consistency reliability and clinical validity were assessed in the PAS (N = 70) ECOG PS: 0 = Fully active; 1 = Restricted in physically strenuous activity Notes The original article can be found online at https://doi.org/10.1186/s12955-017-0815-5 Declarations Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you giv...

Correction to: Psychometric properties of the FACT-M questionnaire in patients with Merkel cell carcinoma

10.1186/s12955-019-1122-0