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Table 1 Comparison of demographics between the two groups

From: Preoperative vitamin D level does not affect the short-term functional outcome after total knee arthroplasty in elderly women

VariableGroup 1 (n = 44)Group 2 (n = 176)p value
Vitamin D level (ng/ml)*27.8 (20.2–52.6)11.4 (2.0–19.9)0.001
Age (years)69.6 (55.0–84.0)67.4 (46.0–86.0)0.055
Weight (kg)60.2 (39.0–86.4)62.7 (42.3–98.0)0.101
Height (cm)151 (142–164)153 (139–177)0.143
BMI (kg/m2)26.2 (19.3–34.2)26.8 (18.0–37.5)0.279
BMD−2.3 (− 3.1 to –1.1)−2.3 (− 3.3 to –0.7)0.601
Right side24 (54.5%)76 (43.2%)0.176
  1. Data for age, weight, height, BMI, and BMD displayed as mean (range). Data for right side displayed as number (percentage)
  2. BMD bone mineral density, BMI body mass index
  3. *Statistically significant