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Table 2 Change in clinical symptoms and inflammatory markers over 60 months based on the original allocation to vitamin D or placebo group in the VIDEO trial

From: Long-term effects of vitamin D supplementation and maintaining sufficient vitamin D on knee osteoarthritis over 5 years

 

Placebo

Vitamin D

Between-group change

n

Change

n

Change

WOMAC pain

81

 − 25 (− 44.5, − 5.4)

91

 − 26.3 (− 44.7, − 7.9)

 − 1.3 (− 28.4, 25.8)

 No surgery

66

 − 16.6 (− 37.3, 4.1)

75

 − 34.5 (− 53.9, − 15.2)

 − 17.9 (− 46.6, 10.8)

WOMAC function

81

 − 67.9 (− 126.4, − 9.4)

91

 − 88.6 (− 143.6, − 33.5)

 − 20.7 (− 101.6, 60.3)

 No surgery

66

 − 34.6 (− 95, 25.9)

75

 − 118.3 (− 174.7, − 61.8)

 − 83.7 (− 167.3, 0)

WOMAC stiffness

81

 − 10.2 (− 18.9, − 1.4)

91

 − 14 (− 22.2, − 5.8)

 − 3.9 (− 15.9, 8.2)

 No surgery

66

 − 5.5 (− 14.7, 3.6)

75

 − 17.3 (− 25.8, − 8.8)

 − 11.8 (− 24.4, 0.9)

Study knee VAS pain

81

 − 13.1 (− 18.7, − 7.5)

92

 − 14.9 (− 20.2, − 9.7)

 − 1.9 (− 9.6, 5.9)

 No surgery

66

 − 11.2 (− 17.3, − 5.1)

76

 − 17 (− 22.7, − 11.3)

 − 5.8 (− 14.3, 2.6)

Utility

81

 − 0.025 (− 0.054, 0.005)

90

 − 0.035 (− 0.063, − 0.007)

 − 0.01 (− 0.051, 0.031)

 No surgery

66

 − 0.037 (− 0.07, − 0.005)

74

 − 0.024 (− 0.054, 0.007)

0.014 (− 0.031, 0.058)

PHQ9

80

0.2 (− 0.4, 0.9)

92

 − 0.5 (− 1.1, 0.1)

 − 0.8 (− 1.7, 0.2)

 No surgery

65

0.8 (0, 1.5)

76

 − 0.5 (− 1.2, 0.2)

 − 1.3 (− 2.3, − 0.2)

IL6

59

 − 1.9 (− 6.5, 2.7)

80

 − 7.2 (− 11.3, − 3.1)

 − 5.3 (− 11.5, 0.9)

 No surgery

48

 − 1.7 (− 7.3, 3.8)

68

 − 8.1 (− 13.1, − 3.1)

 − 6.4 (− 13.8, 1.1)

hs-CRP

59

 − 0.2 (− 0.8, 0.3)

80

 − 0.1 (− 0.6, 0.3)

0.1 (− 0.7, 0.8)

 No surgery

48

 − 0.1 (− 0.7, 0.5)

68

 − 0.1 (− 0.7, 0.4)

0 (− 0.8, 0.8)

  1. BMI, body mass index; hs-CRP, high sensitivity C Reactive protein; WOMAC, Western Ontario and McMaster Universities Osteoarthritis Index; AQoL, Assessment of Quality of Life; PHQ9, Patient Health Questionnaire-9. The between-group difference in change in outcomes was analysed using repeated measures mixed-effects model with fixed terms for age, sex, BMI, KS, physical activity, and treatment status or vitamin D maintainer status. Bold figures denote statistical significance (P < 0.05)
  2. Surgery, including TKR occurred during the 24- and 60-month observational period, and their symptoms, utility, and depression scores were obtained at the 60-month follow-up only, which was after the surgery