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Table 1 Overview of simulated scenarios

From: A simulation study to compare different estimation approaches for network meta-analysis and corresponding methods to evaluate the consistency assumption

Networks

(interventions, direct comparisons)

Network (a)

(A, B, C), 3

Network (b)

(A, B, C, D), 5

Network (c)

(A, B, C, D, E), 7

Network (d)

(A, B, C, D, E), 9

Network (e)

(A, B, C, D, E), 9, additional inconsistency for comparison D vs. E

Inconsistency (\(\text {OR}_{BC}^{incon} = \text {OR}_{BC} \times \text {ROR}_{BC}\))

No inconsistency

RORBC=1

Moderate inconsistency

RORBC=0.8

Severe inconsistency

RORBC=0.6

Heterogeneity

Very low heterogeneity

Ï„2=0.01

Low heterogeneity

Ï„2=0.1

Direct studies per pairwise comparison

k=5

Patients per study arm

n=100

True treatment effects

ORAB=…=ORDE=1.0

Baseline probability

pA=0.1

Replications

R=1000