As a robustness check, we examine the low-risk subsample to further control for medical severity (see details on the low-risk subsample for cesarean delivery use above in the Methods).
4 6 11 35 37 39 44 47 These limitations introduced bias into our previous awareness of fibrosis severity, as details of biopsies were mostly provided by the availability of treatments and integrated databases of phase 3 trials (see online supplementary data S1).
Further, the degree of airflow limitation was not evaluated in this study: the database does not include the stages of COPD severity or details of pulmonary function tests, including forced expiratory volume in 1 second and other indices.
In addition, since the DPC database does not include the stages of COPD severity or details of pulmonary function tests, including forced expiratory volume in 1 second and other indices, the degree of airflow limitation was not evaluated in this study.
Demographic details, severity scores, physiological parameters and information on length of unit stay and in-hospital mortality was gathered.
Uninfected controls had no signs of meningitis and a normal disease severity score (for details of laboratory data, see [ 13]).
Table 1 presents the patient demographic details, severity of illness scores, ventilation status, and survival and length of stay data for primary admissions and readmissions.
The studies were searched for patient characteristics (number, age, and injury severity score (ISS)), details of the intervention (test, control, delivery route, and duration) and length of follow-up during which outcome variables were measured.
This is consistent with data from other groups detailing severity in chronic cholestatic liver diseases 10, 13, 16.
Although Medicare DRGs do not differentiate patients' severity gradients in detail, Medicare DRG CMI has been shown to be able to approximate hospital severity level to a satisfactory degree.
