Table 3.
Comparison of 35 patients who developed established connective tissue disease with 126 patients who remained in the stable stage of undifferentiated connective tissue disease
| Patients with evolution into defined CTD n = 35 |
Patients with 'stable' UCTD n = 126 |
P value | |
| Age, years (mean ± standard deviation) | 43.85 ± 11.1 range: 21–67 |
44.9 ± 12.7 range: 17–78 |
0.651 |
| Duration of follow-up, years | 2.31 ± 1.2 range: 0.5–4 |
4.09 ± 2.36 range: 0.5–9 |
0.0006113 |
| Vitamin D serum levels, ng/mL | 14.7 ± 6.45 range: 4.7–25.2 |
33.0 ± 13.4 range: 6–88.9 |
0.0001 |
CTD, connective tissue disease; UCTD, undifferentiated connective tissue disease.