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Fig. 4 | BMC Cardiovascular Disorders

Fig. 4

From: Vitamin C for preventing atrial fibrillation in high risk patients: a systematic review and meta-analysis

Fig. 4

Effect of vitamin C on the length of hospital stay in percentages. The subgroup on the top includes the US trials, all of which administered vitamin C orally. The non-US trials are divided into groups by oral and intravenous vitamin C administration. The durations of hospital stay were transformed to the relative scale; thus the duration in the corresponding placebo group was given a value of 100%. Thereby the difference between the vitamin C and control groups gives the effect of vitamin C directly as a percentage. The horizontal lines indicate the 95% CI for the vitamin C effect and the square in the middle of the horizontal line indicates the point estimate of the effect in the particular trial. The diamond shapes indicate the pooled effects on the symptoms and their 95% CI

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