Fig. 2 Pooled weighted mean differences in weight reduction between vegetarian a

Question

Fig. 2 Pooled weighted mean differences in weight reduction between vegetarian and non-vegetarian diets. Effects on estimated weight reduction

for each study depicted as solid squares; error bars indicate 95%CIs. The pooled estimate of 1.99 kg (95%CI, 2.72 to 1.25) of weight loss is

JGIM Huang et al: Vegetarian Diet and Weight Control 113 Study WMD (95% CI) Weight Skoldstam (1979) 2.00 (-3.63, -0.37 8.88 Prescott (1988) 0.10 (-2.26, 2.06) 6.89 3.40 0.38, 3.58) 1.16 Nicholson (1999 Dansinger (2005) -2.70 (-6.13, 0.73) 3.83 Barnard (2005) 2.00 (-3.54, -0.46 9.29 -0.60(2.44, 1.24) Gardner (2007) 8.03. 4.40 (-5.58, -3.22) Mahon (2007) 10.89 Turner (2007) 2.50 (-4.87, -0.13 6.23 0.00 (-2.14, 2.14) Burke(no prefer) (2008) 6.94 Burke(prefer) (2008) 0.30 (-2.36, 1.76) 7.22 Barnard (2009) 6.25 3.00 (-3.85, -2.15) 12.36 Kahleova (2013) Mishra (2013 2.84 (-3.77 1.91 12.02 Overall (I-squared 62.3%, p 0.001) 2.02 (-2.80 1.23 100.00 NOTE: Weights are from random effects analysis 1 0 1 Fig, 2 Pooled weighted mean differences in weight reduction between vegetarian and non-vegetarian diets. Effects on estimated weight reduction for each study depicted as solid squares; error bars indicate 95% Cls. The pooled estimate of-1.99 kg (95% CI, -2.72 to -1.25) of weight loss is shown as the diamond. RE random effect, Weight inverse variance weight, WMD weighted mean difference, CIconfidence interval

Explanation / Answer

The 95% confidence interval for the wight loss means

95 times out of 100 times(i.e., with 95% confidence) the pooles estimate of -1.99kg of the weight loss is between -2.72 kg and -1.25 kg

i.e., on the average there will be a weigh loss between 1,25 kg and 2.72 kg 95% of the times

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