Table 3.
Relationship between vitamin D status and markers of TBI severity
| Variable | Units | n | All subjects | n | Vitamin Dreplete | n | Vitamin D insufficient | n | Vitamin D deficient | Uncorrected | Corrected for: age, skin color season | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| χ statistic | P | F statistic | P * | ||||||||||
| Moderate‐Severe TBI | n (%) | 353 | 263 (74·5%) | 70 | 51 (72·9%) | 119 | 93 (78·2%) | 164 | 119 (72·6%) | 1·26 | 0·53 | 0·99 F(2,347) | 0·59 |
| PTA > 1 day | n (%) | 328 | 154 (43·3%) | 66 | 33 (47·1%) | 109 | 55 (46·2%) | 153 | 66 (40·2%) | 1·68 | 0·43 | 1·06 F(2,321) | 0·35 |
| PTA > 1 week | n (%) | 328 | 67 (19·0%) | 66 | 13 (18·6%) | 109 | 27 (22·7%) | 153 | 27 (16·5%) | 2·01 | 0·37 | 1·13 F(2,321) | 0·33 |
| Craniotomy | n (%) | 353 | 2 (0·6%) | 70 | 1 (1·4%) | 119 | 1 (0·8%) | 164 | 0 (0%) | 2·02 | 0·37 | 1·99 F(2,347) | 0·14 |
| Epilepsy | n (%) | 353 | 47 (13·3%) | 70 | 10 (14·3%) | 119 | 16 (13·4%) | 164 | 21 (12·8%) | 0·10 | 0·95 | 0·41 F(2,347) | 0·67 |
Values stated as n (%).
Statistical results from Chi‐squared test, except for *one way ancova when controlling for covariates. Abbreviations: PTA, post‐traumatic amnesia; TBI, traumatic brain injury.