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Table 3 Scoring Methods and Test-retest ability of QOL-OC

From: Development and evaluation of oral Cancer quality-of-life questionnaire (QOL-OC)

Scale Scales Items Score Range Min Max Rough Score Standardized Score Spearman correlation coefficient(r)
Pain and discomfort PD 1, 2, 3, 4, 26 1~ 4 5 20 (1 + 2 + 3 + 4 + 26)/5 [(RS-1)/3] × 100 0.881**
Eating ET 5, 6, 7, 8 1~ 4 4 16 (5 + 6 + 7 + 8)/4 [(RS-1)/3] × 100 0.975**
Saliva SA 11, 12 1~ 4 2 8 (11 + 12)/2 [(RS-1)/3] × 100 0.918**
Social contact SC 15, 16, 17, 18, 23 1~ 4 5 20 (15 + 16 + 17 + 18 + 23)/5 [(RS-1)/3] × 100 0.939**
Diet DT 21, 22 1~ 4 2 8 (21 + 22)/2 [(RS-1)/3] × 100 0.923**
Teeth TE 9 1~ 4 1 4 9 [(RS-1)/3] × 100 0.984**
Opening mouth OM 10 1~ 4 1 4 10 [(RS-1)/3] × 100 0.938**
Sense of taste TA 13 1~ 4 1 4 13 [(RS-1)/3] × 100 0.997**
Appearance AP 14 1~ 4 1 4 14 [(RS-1)/3] × 100 0.817**
Sexuality SX 19 1~ 4 1 4 19 [(RS-1)/3] × 100 / a
Oral ulcer OU 20 1~ 4 1 4 20 [(RS-1)/3] × 100 0.990**
Shoulder & neck function SN 24 1~ 4 1 4 24 [(RS-1)/3] × 100 0.374*
Bleeding Gingiva BG 25 1~ 4 1 4 25 [(RS-1)/3] × 100 0.997**
Weight loss WL 27 1~ 2 1 2 27 (RS-1) × 100 0.866**
Weight gain WG 28 1~ 2 1 2 28 (RS-1) × 100 / a
  1. *P < 0.05 **p < 0.01
  2. a Each subject got 0 points in the sexuality scale and weight gain scale in the retest trial (constant sequence), so these scales were not part of the calculation of the correlation coefficient