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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

From: Vitamin D deficiency in 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
  1. CTD, connective tissue disease; UCTD, undifferentiated connective tissue disease.