https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:26006 Wed 06 Apr 2022 14:02:24 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:33937 interaction=0·25). p values for interaction for all other subgroup analyses were also higher than 0·05; therefore, we did not show that the effects of this intervention are stronger in any one subgroup than in another. Six studies were assessed as being at low risk of bias, and one was assessed as being at unclear risk of bias. The two-step meta-analysis did not reveal evidence of heterogeneity of effect (I²=0·0, p=0·56). Interpretation: Vitamin D supplementation reduced the rate of asthma exacerbations requiring treatment with systemic corticosteroids overall. We did not find definitive evidence that effects of this intervention differed across subgroups of patients. Funding: Health Technology Assessment Program, National Institute for Health Research (reference number 13/03/25).]]> Wed 06 Apr 2022 14:01:37 AEST ]]>