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Table 2 Chi-square goodness of fit statistic for HARP2, ALTA, EDEN and SAILS

From: Re-analysis of ventilator-free days (VFD) in acute respiratory distress syndrome (ARDS) studies

χ2 statistic

HARP2

ALTA

EDEN

SAILS

OLS

292.8

168.20

618.65

486.52

Poisson

618.8

307.07

1125.11

849.82

Zero-inflated Poisson

210.9

113.53

378.58

204.05

Logit-Poisson hurdle

117.1

54.40

153.71

104.70