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Statistical analysis of Study 2 scores of wellbeing (Winter 2002–2003). |
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| Intent-to-treat analysis |
Per-protocol analysis |
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| Dose of Vitamin D |
N |
Age |
N |
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| mcg/day (IU/day) |
Total in group, (% female) |
yr (SD) |
25(OH)D nmol/L (SD) |
December 2002 Score (out of 16) |
February 2003 Score (out of 16) |
Total in group, (% female) |
December 2002 Score (out of 16) |
February 2003 Score (out of 16) |
|
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| CONTINUERS FROM STUDY 1 (on Vit D since previous year) |
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| 15 (600) |
22 (77%) |
54 (14) |
69 (26) |
7.2 (4.5) |
4.4 (3.4) |
15 (73%) |
6.9 (4.8) |
4.4 (3.4) b |
|
| 100 (4000) |
24 (84%) |
56 (9) |
126 (45) a |
4.4 (4.4) a |
4.0 (3.7) |
16 (88%) |
4.6 (4.6) |
4.0 (3.7) |
|
| NEW PATIENTS FOR STUDY 2 |
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| 15 (600) |
33 (68%) |
48 (13) |
39 (9) |
8.0 (5.2) |
5.4 (4.3) |
25 (64%) |
8.7 (5.5) |
5.4 (4.3) b |
|
| 100 (4000) |
33 (85%) |
50 (14) |
39 (9) |
8.4 (5.5) |
3.9 (3.6) c |
26 (89%) |
8.1 (5.6) |
3.9 (3.6) bc |
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|
a Different from 15 mcg (600 IU)/day group (the value above the mean marked by this footnote) by t-test p < 0.04; lower (better) than in the 600 IU/day group by Mann-Whitney p = 0.039. b Paired t-test, December score vs February Score (the value to the left of the mean marked by this footnote) p < 0.012; also significant by the non-parametric equivalent to paired t-test, the Wilcoxan test, p < 0.012. c For New patients, low vs high dose group, 2-tail unpaired t test p = 0.188; Mann-Whitney p = 0.183; i.e. not significantly different. | |||||||||
Vieth et al. Nutrition Journal 2004 3:8 doi:10.1186/1475-2891-3-8 |
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