Background: Daily paediatric asthma readmissions within 28 days are a good example of a low count time series and not easily amenable to common time series methods used in studies of asthma seasonality and time trends. We sought to model and predict daily trends of childhood asthma readmissions ...
The use of additive and multiplicative hazard models is examined for a cohort study of 2696 women followed up for 12 years. The multiplicative model implie... MJ Campbell - 《Statistics in Medicine》 被引量: 9发表: 1985年 Case-cohort analysis for multiple events time data under general additi...
For example, a U-shaped relationship was found between fasting plasma glucose (FPG) and SUA levels in individuals with normal glucose tolerance (NGT)[6], but a linearly negative relationship was observed between these variables in diabetic patients[7]. A recent study showed that the association ...
to be consistent and asymptotically normally distributed.The limiting variance-covariance matrix can be consistently estimated by the nested case-control data.A simulation study is conducted to assess the finite sample performance of the proposed estimator and a real example is provided for illustration....
Most machine learning approaches to the problem have been relatively ad hoc; for example, common approaches for handling observations in which the event status is unknown include (1) discarding those observations, (2) treating them as non-events, (3) splitting those observations into two ...
For example the epistatic variance of comparison (L1 + L2 —2L3) is given as a 1/6th of its total vari- ance because /c2 = 6 in this case. (ii) Additive and dominance components In the absence of epistasis we can simply substitute L18 for L1, etc. in the standard comparison for ...
1) A shared frailty model (with gamma or log-normal frailty distribution) and Cox proportional hazard model. Clustered and recurrent survival times can be studied. 2) Additive frailty models for proportional hazard models with two correlated random effects (intercept random effect with random slope)...
There would appear, therefore, to be little point in fitting an additive and dominance model to final height. For flowering time there is evidence of epistasis in the first but not in the last two seasons. However, the evidence from other analyses of flowering time presented in section 4 (...
[ { "example_id" : str # unique sample identifier "image_id" : str # relative path to input image "task_name" : str # specifies the task such as "vqa", "refexp" "task_query" : str # object category, question, referring expressions, or null "task_bbox" : [x1,y1,x2,y2] ...
Genotype–phenotype association analyses were performed within each cohort, using an additive model, on imputed SNP dosage scores. Adjustments for age, sex, and population stratification were included in the model for each cohort. Cohort-specific covariates—for example, site or familial relationships—...