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Fig. 1 | BMC Medical Research Methodology

Fig. 1

From: How to analyze work productivity loss due to health problems in randomized controlled trials? A simulation study

Fig. 1

Mean bias for the number of observations in each arm = 100. Legends: OLS: ordinary least squares; NB: negative binomial; ZTNB: two-part model – logistic regression for the probability of being zero, and generalized linear regression with zero-truncated NB distribution for the non-zeros; ZG: two-part model – logistic regression for the probability of being zero, and generalized linear regression with Gamma distribution for the non-zeros; Three-part: multinomial logistic regression for the probabilities of being zero and 60 and generalized linear regression with Beta distribution for the those with values in (0, 60) (transformed to (0, 1))

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BMC Medical Research Methodology

ISSN: 1471-2288

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