caffeine {meta}

Caffeine for daytime drowsiness

Description

Caffeine for daytime drowsiness (Cochrane Practice review)

Format

A data frame with the following columns:

study	study label
year	year of publication
h.caf	Number of participants with headaches (caffeine group)
n.caf	Number of participants (caffeine group)
h.decaf	Number of participants with headaches (decaf group)
n.decaf	Number of participants (decaf group)
D1	Domain 1 of risk of bias 2 tool (RoB 2)
D2	Domain 2 (RoB 2)
D3	Domain 3 (RoB 2)
D4	Domain 4 (RoB 2)
D5	Domain 5 (RoB 2)
rob	Overall RoB 2 assessment

Details

Data come from the Cochrane Practice review on caffeine for daytime drowsiness. Eight fictitous studies evaluate the risk of headaches after drinking either caffeinated or decaffeinated coffee.

References

Higgins JPT, Savović J, Page MJ, Sterne JA on behalf of the RoB2 Development Group (2019): Revised Cochrane risk-of-bias tool for randomized trials. https://www.riskofbias.info/welcome/rob-2-0-tool

See Also

metabin, rob

Examples

oldset <- settings.meta("RevMan5")

data(caffeine)
head(caffeine)

m1 <- metabin(h.caf, n.caf, h.decaf, n.decaf, sm = "OR",
  data = caffeine, studlab = paste(study, year))

# Add risk of bias assessment to meta-analysis
m1 <- rob(D1, D2, D3, D4, D5, overall = rob, data = m1, tool = "rob2")

# Print risk of bias assessment
rob(m1)

# Forest plot with risk of bias assessment
forest(m1)

settings.meta(oldset)