Table 2.
Results of Pearson’s coefficient correlation between clinical and psychological variables
| Measure | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. Foot care (T1) | – | |||||||||||||
| 2. Foot care (T2) | 0.49*** | – | ||||||||||||
| 3. IPQ1 (T1) | 0.28*** | 0.06 | – | |||||||||||
| 4. IPQ2 (T1) | −0.03 | 0.03 | 0.14* | – | ||||||||||
| 5. IPQ3 (T1) | −0.04 | −0.16** | −0.01 | −0.003 | – | |||||||||
| 6. IPQ4 (T1) | −0.06 | −0.19** | 0.22*** | −0.16** | 0.20*** | – | ||||||||
| 7. IPQ5 (T1) | 0.19*** | 0.08 | 0.55*** | 0.14* | −0.18** | 0.06 | – | |||||||
| 8. IPQ6 (T1) | 0.18** | 0.14* | 0.41*** | 0.20*** | −0.20*** | −0.07 | 0.31*** | – | ||||||
| 9. IPQ7 (T1) | −0.15* | −0.28*** | −0.06 | −0.24*** | 0.40*** | 0.38*** | −0.14* | −0.26*** | – | |||||
| 10. IPQ8 (T1) | 0.17** | 0.10 | 0.44*** | 0.21*** | 0.05 | −0.12* | 0.29*** | 0.49*** | −0.18** | – | ||||
| 11. Anxiety (T1) | 0.04 | −0.002 | 0.23*** | 0.11 | 0.14* | 0.01 | 0.16** | 0.16** | −0.04 | 0.21*** | – | |||
| 12. Depression (T1) | −0.003 | −0.13* | 0.18** | 0.03 | 0.19*** | 0.03 | −0.03 | −0.04 | 0.06 | 0.13* | 0.70*** | – | ||
| 13. HbA1c (T1) | 0.01 | −0.12 | 0.17** | 0.06 | −0.05 | −0.02 | 0.15* | 0.05 | 0.04 | 0.02 | −0.04 | −0.10 | – | |
| 14. Duration of diagnosis (T1) | 0.12* | 0.11 | −0.006 | 0.06 | −0.03 | −0.04 | −0.08 | −0.03 | −0.02 | −0.02 | −0.01 | −0.07 | −0.15* | – |
IPQ=Illness Perception Questionnaire; IPQ1=consequences; IPQ2=timeline; IPQ3=personal control; IPQ4=treatment control; IPQ5=identity (symptoms); IPQ6=concerns; IPQ7=comprehension; IPQ8=emotional response; HbA1c=glycosylated hemoglobin.
*P<0.05; **P⩽0.01; ***P⩽0.001.