SCI-R items | Exploratory factor analysis | Acceptability | Reliability | Interpretability | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Mean (standard deviation) | Forced one-factor solution 1 | Forced one-factor solution 1(excluding item 13) | Completion rate N = 353 n (%) | % floor | % ceiling | Alpha | Item-total correlations | MID | MCID | |||
1. Check blood glucose with monitor | 4.26 | (0.94) | 0.55 | 0.55 | 350 | (99.2) | 1.4 | 53.3 | .75 | .46 | 0.26 – 0.47 | 0.38 |
2. Record blood glucose | 3.86 | (1.32) | 0.45 | 0.45 | 343 | (97.2) | 8.2 | 45.3 | .76 | .35 | 0.34 – 0.66 | 0.34 |
3. Check ketones a | 2.40 | (1.68) | - | - | 121 | (34.2) | - | - | - | - | - | - |
4. Correct dosage of pills/insulin | 4.81 | 0.57 | 0.52 | 0.54 | 343 | (97.2) | 1.1 | 82.7 | .76 | .36 | 0.07 – 0.28 | 0.05 |
5. Take pills/insulin at correct time | 4.60 | 0.63 | 0.55 | 0.56 | 348 | (98.6) | 0.8 | 64.0 | .76 | .38 | 0.19 – 0.31 | 0.19 |
6. Correct food portions | 3.77 | 0.80 | 0.66 | 0.67 | 349 | (98.9) | 1.7 | 15.3 | .75 | .51 | 0.39 – 0.40 | 0.08 |
7. Meals/snacks eaten on time | 3.92 | 0.83 | 0.69 | 0.69 | 348 | (98.6) | 1.7 | 22.1 | .74 | .53 | 0.29 – 0.42 | 0.31 |
8. Keep food records | 1.59 | 0.99 | 0.39 | 0.39 | 346 | (98.0) | 62.9 | 3.7 | .76 | .31 | 0.20 – 0.49 | 0.05 |
9. Read food labels | 3.12 | 1.37 | 0.49 | 0.49 | 347 | (98.3) | 18.7 | 19.0 | .76 | .38 | 0.32 – 0.69 | 0.14 |
10. Recommended carbohydrates | 3.57 | 1.24 | 0.54 | 0.54 | 302 | (85.6) | 8.5 | 21.0 | .75 | .44 | 0.52 – 0.62 | 0.26 |
11. Carry quick acting sugar | 3.78 | 1.48 | 0.54 | 0.53 | 347 | (98.3) | 15.3 | 46.7 | .75 | .43 | 0.25 – 0.74 | 0.26 |
12. Attend clinic appointments | 4.86 | 0.48 | 0.57 | 0.57 | 347 | (98.3) | 0.6 | 87.8 | .76 | .42 | 0.10 – 0.24 | 0.13 |
13. Wear medic alert | 2.15 | 1.71 | 0.25 | - | 348 | (98.6) | 65.4 | 22.1 | - | - | 0.15 – 0.85 | 0.14 |
14. Exercise | 3.35 | 1.09 | 0.52 | 0.52 | 349 | (98.9) | 5.4 | 17.0 | .75 | .40 | 0.26 – 0.54 | 0.08 |
15. Adjust insulin dosage | 3.38 | 1.42 | 0.42 | 0.42 | 338 | (95.8) | 17.0 | 24.9 | .76 | .35 | 0.06 – 0.71 | 0.04 |
SCI-R Total Score b | 69.00 | 12.82 | 348 | (98.6) | - | - | .77 | - | 6.50 – 7.0 | 4.00 |