Research Article
Vitamin D Supplementation and Cognition in People with Type 2 Diabetes: A Randomized Control Trial
Table 2
Summary statistics for cognitive test scores.
| | Assignment | Low dose | High dose | Total | | | SD | | | SD | | | SD |
| Symbol-Digit Modality -score | Event | Screening | 0 | . | . | 0 | . | . | 0 | . | . | Baseline | 15 | -.21 | 1.01 | 15 | -.28 | 1.26 | 30 | -.25 | 1.12 | Week 2 | 15 | .12 | .91 | 15 | -.07 | 1.10 | 30 | .02 | 1.00 | Week 8 | 0 | . | . | 0 | . | . | 0 | . | . | Week 13 | 15 | .12 | .82 | 14 | .05 | 1.20 | 29 | .08 | 1.01 |
| Verbal fluency -score | Event | Screening | 15 | -.68 | 1.28 | 15 | -.94 | .80 | 30 | -.81 | 1.06 | Baseline | 15 | -.46 | 1.13 | 15 | -.61 | .78 | 30 | -.54 | .95 | Week 2 | 15 | -.58 | .95 | 15 | -.56 | .98 | 30 | -.57 | .95 | Week 8 | 14 | -.10 | 1.27 | 12 | -.36 | .81 | 26 | -.22 | 1.07 | Week 13 | 15 | -.35 | 1.10 | 14 | -.37 | .93 | 29 | -.36 | 1.00 |
| HVLT total recall -score | Event | Screening | 0 | . | . | 0 | . | . | 0 | . | . | Baseline | 15 | 38.00 | 7.01 | 15 | 36.40 | 10.47 | 30 | 37.20 | 8.79 | Week 2 | 15 | 40.73 | 8.48 | 15 | 39.93 | 11.51 | 30 | 40.33 | 9.94 | Week 8 | 0 | . | . | 0 | . | . | 0 | . | . | Week 13 | 15 | 38.07 | 8.92 | 14 | 39.57 | 11.50 | 29 | 38.79 | 10.09 |
| HVLT delayed recall -score | Event | Screening | 0 | . | . | 0 | . | . | 0 | . | . | Baseline | 15 | 38.00 | 10.52 | 15 | 36.93 | 12.14 | 30 | 37.47 | 11.17 | Week 2 | 15 | 38.40 | 12.25 | 15 | 38.80 | 13.51 | 30 | 38.60 | 12.67 | Week 8 | 0 | . | . | 0 | . | . | 0 | . | . | Week 13 | 15 | 36.93 | 8.92 | 14 | 37.21 | 14.30 | 29 | 37.07 | 11.61 |
| HVLT retention -score: | Event | Screening | 0 | . | . | 0 | . | . | 0 | . | . | Baseline | 15 | 42.27 | 12.62 | 15 | 41.20 | 14.12 | 30 | 41.73 | 13.17 | Week 2 | 15 | 41.93 | 15.40 | 15 | 39.20 | 12.34 | 30 | 40.57 | 13.78 | Week 8 | 0 | . | . | 0 | . | . | 0 | . | . | Week 13 | 15 | 41.47 | 11.87 | 14 | 40.29 | 15.64 | 29 | 40.90 | 13.58 |
| Stroop word reading -score | Event | Screening | 0 | . | . | 0 | . | . | 0 | . | . | Baseline | 15 | -.78 | .58 | 15 | -.88 | .78 | 30 | -.83 | .68 | Week 2 | 15 | -.67 | .46 | 15 | -.76 | .67 | 30 | -.72 | .57 | Week 8 | 0 | . | . | 0 | . | . | 0 | . | . | Week 13 | 15 | -.56 | .26 | 14 | -.62 | .90 | 29 | -.59 | .64 |
| Stroop color naming -score | Event | Screening | 0 | . | . | 0 | . | . | 0 | . | . | Baseline | 15 | -.73 | .57 | 15 | -.92 | .59 | 30 | -.82 | .58 | Week 2 | 15 | -.56 | .61 | 15 | -.73 | .55 | 30 | -.64 | .58 | Week 8 | 0 | . | . | 0 | . | . | 0 | . | . | Week 13 | 15 | -.38 | .56 | 14 | -.73 | .72 | 29 | -.55 | .65 |
| Stroop Interference -score | Event | Screening | 0 | . | . | 0 | . | . | 0 | . | . | Baseline | 15 | -.53 | .88 | 15 | -.62 | 1.23 | 30 | -.57 | 1.05 | Week 2 | 15 | -.40 | .97 | 15 | -.24 | 1.06 | 30 | -.32 | 1.00 | Week 8 | 0 | . | . | 0 | . | . | 0 | . | . | Week 13 | 15 | -.15 | .88 | 14 | -.30 | .96 | 29 | -.22 | .91 |
| Trail Making Test Part A -score | Event | Screening | 0 | . | . | 0 | . | . | 0 | . | . | Baseline | 15 | -.02 | .91 | 15 | -.15 | 1.58 | 30 | -.09 | 1.27 | Week 2 | 15 | -.02 | .67 | 15 | -.05 | 1.85 | 30 | -.04 | 1.37 | Week 8 | 0 | . | . | 0 | . | . | 0 | . | . | Week 13 | 15 | .05 | .63 | 14 | .17 | 1.47 | 29 | .11 | 1.10 |
| Trail Making Test Part B -score | Event | Screening | 0 | . | . | 0 | . | . | 0 | . | . | Baseline | 15 | -.29 | .82 | 15 | -1.13 | 2.63 | 30 | -.71 | 1.96 | Week 2 | 15 | -.47 | 1.07 | 14 | -.29 | 1.68 | 29 | -.38 | 1.37 | Week 8 | 0 | . | . | 0 | . | . | 0 | . | . | Week 13 | 15 | .01 | .85 | 14 | -.10 | 1.35 | 29 | -.04 | 1.10 |
| Letter-Number Sequencing Scaled Score | Event | Screening | 0 | . | . | 0 | . | . | 0 | . | . | Baseline | 15 | 8.67 | 1.50 | 14 | 7.57 | 3.96 | 29 | 8.14 | 2.95 | Week 2 | 15 | 8.80 | 1.32 | 14 | 8.71 | 2.87 | 29 | 8.76 | 2.17 | Week 8 | 0 | . | . | 0 | . | . | 0 | . | . | Week 13 | 15 | 9.13 | 2.53 | 13 | 9.00 | 1.87 | 28 | 9.07 | 2.21 |
| Naming -score | Event | Screening | 15 | -1.52 | .98 | 15 | -1.63 | .70 | 30 | -1.57 | .84 | Baseline | 15 | .25 | 1.03 | 15 | -.65 | .95 | 30 | -.20 | 1.07 | Week 2 | 15 | -1.45 | 1.16 | 15 | -1.60 | .84 | 30 | -1.53 | 1.00 | Week 8 | 14 | .06 | 1.45 | 12 | -.52 | 1.01 | 26 | -.21 | 1.28 | Week 13 | 15 | .41 | 1.46 | 14 | -.36 | .95 | 29 | .04 | 1.28 |
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