Table 3 The association between CKD stage and IP items and item mean score + SD
From: Illness perceptions predict distress in patients with chronic kidney disease
Perception | Cronbach’s α | Possible range | Mean | SD | Stage 1–3 CKD normal to moderate eGFR (30–90 ml/min/1.73m2) (N = 113 /56.5%) | Stage 4–5 CKD low eGFR to ESRD (0–29 (ml/min/1.73m2) (N = 87/43.5%) | ANOVA | ||
|---|---|---|---|---|---|---|---|---|---|
Mean | SD | Mean | SD | p Value | |||||
1. Identity | N/A | 0–14 | 3.74 | 3.3 | 2.23 | 2.1 | 4.51 | 3.2 | p < 0.001 |
2. Timeline-acute/chron | 0.95 | 6–30 | 22.25 | 6.2 | 20.10 | 6.5 | 24.02 | 5.2 | p < 0.001 |
3. Timeline-cyclical | 0.92 | 4–20 | 9.08 | 3.3 | 8.05 | 3.2 | 9.94 | 3.4 | p < 0.001 |
4. Consequences | 0.91 | 6–30 | 17.87 | 5.7 | 15.23 | 4.7 | 20.03 | 5.3 | p < 0.001 |
5. Treatment control | 0.82 | 5–25 | 16.05 | 3.9 | 17.27 | 3.4 | 15.49 | 3.2 | p < 0.001 |
6. Personal control | 0.84 | 6–30 | 18.55 | 4.6 | 19.97 | 4.1 | 17.94 | 3.6 | p < 0.001 |
7. Illness coherence | 0.79 | 5–25 | 16.98 | 3.7 | 17.30 | 4.1 | 16.80 | 2.6 | p < 0.05 |
8. Emotion representations | 0.94 | 6–30 | 19.90 | 6.3 | 17.36 | 5.8 | 21.80 | 5.6 | p < 0.001 |