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Table 5 Spearman correlation coefficient between items and its corresponding scales of QOL-OC

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

Items Scales
PD ET SA SC DT
31 Pain in the mouth .694 ** .277** .182** .050 .253**
32 Pain in the jaw .525** .263** .245** .116 .234**
33 Pain in the throat .478** .200** .199** .218** .201**
34 Discomfort in the mouth .729** .324** .150* .187** .315**
56 Use of painkillers .376** .128 .175** .116 .136*
35 Eating fluid .001 .372** .063 .203** .116
36 Eating semifluid .245** .506** .171* .299** .218**
37 Eating solid .322** .905** .274** .502** .451**
38 Choked when eating .271** .553** .346** .325** .342**
41 Dry mouth .164* .211** .861** .200** .268**
42 Sticky saliva .256** .341** .779** .274** .282**
45 Difficult chatting .043 .392** .183** .809** .364**
46 Social contact with families .113 .384** .193** .691** .241**
47 Social contact with friends .136* .422** .229** .789** .329**
48 Social contact in public .175** .457** .183** .826** .367**
53 Pronunciation .145* .551** .258** .850** .457**
51 Not enjoying eating .300** .453** .334** .382** .854**
52 Diet change .283** .381** .257** .442** .905**
  1. Abbreviations: PD pain and discomfort, ET eating, SA saliva, SC social contact, DT diet
  2. Correlation coefficients between items and its corresponding scales were made in bold
  3. *p < 0.05
  4. **p < 0.01