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Table 2 Correlations among the QLQ-C30 scales before and after operation

From: The validation of the standard Chinese version of the European Organization for Research and Treatment of Cancer Quality of Life Core Questionnaire 30 (EORTC QLQ-C30) in pre-operative patients with brain tumor in China

  PF RF EF CF SF QL FA NV PA
PF .789** .306* 0.12 .352** .267* 0.24 -.580** -0.24 -.427**
RF .474** .288* 0.21 .355** .551** .350** -.366** -0.20 -.353**
EF -0.04 -0.01 .272* 0.21 0.10 .334** -0.01 -.270* -.283*
CF .331** 0.12 0.23 .454** 0.20 .263* -.330** -.357** -0.24
SF 0.18 0.18 .321** 0.22 .391** 0.22 -0.22 -0.18 -.448**
QL .381** .315* .272* .254* 0.21 .607** -.489** -.357** -.616**
FA -.540** -.352** -.331** -.538** -.322** -.402** .697** .304* .580**
NV -.243* 0.01 0.07 0.01 -0.04 -.245* 0.20 .367** .406**
PA -.383** -0.14 -0.15 -0.21 -.307* -.346** .296* .316** .610**
  1. # Before operation under the diagonal; after operation above the diagonal. Values = Pearson's r. Negative correlations are an artifact of the scoring procedures. For the functional scales (PF, RF, CF, EF, SF, and QL), a higher score represents a higher level of functioning. For the symptom scales (FA, NV, and PA ), a higher score represents a higher level of symptoms. All correlation coefficients are statistically significant.
  2. **. Correlation is significant at the 0.01 level (2-tailed).
  3. *. Correlation is significant at the 0.05 level (2-tailed).
  4. Abbreviations: CF Cognitive functioning; EF Emotional functioning; FA Fatigue; NV Nausea and vomiting; PA Pain; PF physical function; QL Global health status; RF role function; SF Social functioning