Restorative Effect of Vitamin D Deficiency on Knee Pain and Quadriceps Muscle Strength in Knee Osteoarthritis
ActaMedica Iranica, Article in Press (24 May 2015).
Behzad Heidari1, 2, Yahya Javadian1 javad835 at yahoo.com , Mansour Babaei1, 3, and Behnaz Yousef Ghahari1, 3
1 Mobility Impairment Research Center, Babol University of Medical Sciences, Babol, Iran
2 Department of Internal Medicine, Rouhani Hospital, Babol University of Medical Sciences, Babol, Iran
3Department of Rheumatology, Rouhani Hospital, Babol University of Medical Sciences, Babol, Iran
|Vitamin D||13 ng||38 ng|
|Quadriceps muscle strength||15 kg||21 kg|
|Knee pain, WOMAC (0-16)||9||2|
|Knee pain, VAS (0-100)||39 mm||13 mm|
See also VitaminDWiki
- Overview Osteoarthritis and Vitamin D
- Good evidence for knee osteoarthritis and vitamin D, unsure of other OA – Review March 2013
- Knee Osteoarthritis 3.2X more likely to get worse if low Vitamin D and high PTH – Dec 2014
- Probability of knee osteoarthritis up 50 percent if 20 ng less vitamin D – Nov 2011
- Musculoskeletal pain reduced with 4,000 IU of vitamin D – RCT April 2015
- Pain reduced when enough vitamin D was given – review March 2015
- Pain and Vitamin D - Review April 2015
- Vitamin D supplementation improves muscle strength in healthy adults – meta-analysis of 6 RCT Aug 2014
- Does vitamin D treat pain – still not absolutely, positively sure – meta-analysis April 2015
- Knee osteoarthritis reduced somewhat by 50,000 IU vitamin D monthly (need more) – RCT Aug 2015
- Proof that Vitamin D Works This study = Proof #60 (80 proffs as of May 2017)
Both vitamin D deficiency and quadriceps muscle weakness are associated with knee osteoarthritis (KOA) and pain. The aim of this study was to determine the restorative effect of vitamin D deficiency on pain and quadriceps muscle strength in knee osteoarthritis. Patients with KOA aged > 30 years, presence of knee pain for at least one month or longer and serum 25-hydroxyvitamin (25-OHD) deficiency were recruited in the study. Participants with KOA compatible with Kellgren-Lawrence grade 4, joint instability, and effusion, history of surgery or inflammatory arthropathies were excluded. Serum 25-OHD was assessed by ELISA method and concentrations <20 ng/ml was considered deficiency. Quadriceps muscle strength was measured by dynamometry method and intensity of knee pain by Western Ontario and McMaster University Osteoarthritis index scored by Likert scale and visual analogue scale. All participants received 50.000 IU oral cholecalciferol weekly for at least two months. The influence of raising serum 25- OHD on quadriceps muscle strength and pain was assessed by calculation of mean changes from baseline at the end of the treatment period using paired t-test. A total of 67 patients with mean age of 50 ± 6.6 years of age were treated for 2 months. Serum 25-OHD reached to sufficient levels in all except one patient. At the end of the study period, serum 25-OHD and quadriceps muscle strength increased significantly as compared with baseline (P=0.007 and P=0.002 respectively), whereas knee pain decreased significantly based on Western Ontario and McMaster University Osteoarthritis index (P=0.001) as well as visual analogue scale scores (P=0.001).These findings indicated that correction vitamin D deficiency in patients with KOA exerts significant favorable effect on quadriceps muscle strength and knee pain.
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