Systematic Reviews

Table 5 Simulation results for the high mean (control 7, treatment 5)

From: Do alternative methods for analysing count data produce similar estimates? Implications for meta-analyses

	No overdispersion		Moderate overdispersion		High overdispersion
	RaR^a = 0.71		RaR^a = 0.70		RaR^a = 0.70
	Mean difference^b	SD	Mean difference	SD	Mean difference	SD
Dichotomise RR	0.29	0.06	0.30	0.07	0.30	0.07
Poisson RaR	0.01	0.02	0.01	0.03	0.01	0.03
Simple RaR	0.01	0.02	0.01	0.03	0.01	0.03
Time to the first event HR	0.28	0.14	0.29	0.14	0.30	0.15
Marginal model HR	0.03	0.10	0.04	0.10	0.04	0.10
Andersen-Gill HR	−0.07	0.09	−0.05	0.10	−0.05	0.10
Ratio of means	0.01	0.04	0.01	0.05	0.01	0.05
Ratio of medians	0.01	0.06	0.02	0.07	0.01	0.06

SD standard deviation
^aRate ratio from negative binomial regression model
^bMean of the estimate minus negative binomial rate ratio

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ISSN: 2046-4053

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