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Table 3 Example statistics for randomized controlled trials on vitamin B12 intake and vitamin B12 status

From: Transformations of summary statistics as input in meta-analysis for linear dose-response models on a logarithmic scale: a methodology developed within EURRECA

Reference

 

Observed univariate statistics

  

Required statistics

 
  

X0*

Type Y0

Y0

n

mX

mY

sY

bYX

se(bYX)

[16]

intervention

405

mean, SD

379, 189

17

6.00

5.83

0.47

0.12

0.03

 

control

5

mean, SD

211, 77

17

1.61

5.29

0.35

  

[17]

intervention

505

med, IQR

198, 158-271

20

6.22

5.29

0.40

0.13

0.04

 

control

5

med, IQR

110, 73-165

20

1.61

4.70

0.60

  
  1. *) X0 represents the dose provided plus the dietary intake. When dietary intake of vitamin B12 was not reported 5 μg/day was added to the provided dose. The 5 μg/day was calculated as the average dietary intake from several studies.