Yet, the co〆xistence of grouping and rightヽensoring poses major difficulties in regression analysis. To implement generalised linear regression of GRC counts, we derive modified Poisson estimators and their asymptotic properties, develop a hybrid line search algorithm for parameter inference, ...
Excessive zeros are common in practice and may cause overdispersion and invalidate inferences when fitting Poisson regression models. Zero-inflated Poisson regression models may be applied if there are inflated zeros; however, it is desirable to test if there are inflated zeros before such zero-inflat...
where, εrεr, εθεθ, and uare radial strain, circumferential strain, and radial displacement of surrounding rock, respectively; p 0is the initial geostress before excavation; pipiis the deformational support pressure; Gand vare shear modulus and Poisson's ratio of the rock mass, ...
Monte Carlo EM for missing covariates in parametric regression models. When the missing covariates are categorical, a useful technique for obtaining parameter estimates is the EM algorithm by the method of weights proposed in ... JG Ibrahim,Ming-Hui Chen and Stuart R. Lipsitz - 《Biometrics》 被...
A modified poisson regression approach to prospective studies with binary data. Relative risk is usually the parameter of interest in epidemiologic and medical studies. In this paper, the author proposes a modified Poisson regression a... Guangyong,Zou - 《American Journal of Epidemiology》 被引量:...
We evaluated the risk of an adverse event of special interest using conditional Poisson regression, adjusting for seasonal effects. Findings Of 1 253 497 individuals who received at least one dose of CoronaVac during the study period, 622 317 (49·6%) were aged at least 60 years and ...
Estimates of relative risk for emergency department visits were based on Poisson mixed effects regression models applied to daily visit counts. Results For asthma, the strongest association was observed at lag day 0 with excess relative risk of 66%(28,117). For congestive heart failure the excess...
Poisson ratio −0.170 0.064 Young modulus 0.157 0.087 Shear modulus 0.157 0.087 Tensile strength 0.156 0.089 Speed 0.947 0.000 Pressure 0.221 0.015 The importance of the current study is that: despite the dominant effect of the speed and the system pressure on the generated noise, they cannot be...
If using a Poisson distribution (weight = [Math Processing Error]1/SN), the fitting effect ([Math Processing Error]r¯=0.984 and [Math Processing Error]\unicodex03C3¯=9.3) is slightly worse than that ([Math Processing Error]r¯=0.986 and [Math Processing Error]\unicodex03C3¯=8.4)...
(Fig.2E). The predictability of astigmatism correction was 89.7% of eyes within ± 0.5 D (Fig.2G). Figure2H showed the linear regression model between the attempted target-induced astigmatism vector (TIA) and the achieved surgically induced astigmatism vector (SIA), withR2 = 0.79 in ...