Comparison of findings in patients with NF1 and controls
| Patients | Controls | Statistical test of difference | ||||
|---|---|---|---|---|---|---|
| *Serum 25-hydroxyvitamin D concentration. NS, not significant. | ||||||
| Number studied | 55 | 58 | ||||
| Age in years (mean (SD)) | 40.3 (10.4) | 36.0 (8.8) | t111 = 2.38, p = 0.019 | |||
| Female:male ratio | 33:22 | 38:20 | NS | |||
| Vitamin D* (ng/mL) | ||||||
| Mean (SD) | 15.7 (7.5) | 35.5 (17.1) | t111 = 7.91, p<<0.0001 | |||
| Geometric mean (SD) | 14.0 (1.6) | 31.4 (1.7) | t111 = 8.66, p<<0.0001 | |||
| Proportion <20 ng/mL | 72% | 21% | χ2 = 30.8, p<<0.0001 | |||