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Our observation that the standardised mortality ratio calculated with the admission physiological variables was closer to unity than that calculated with the worst 24-hour values may be different in other units.
Observed to expected (O E) mortality ratio calculated for POSSUM and P-POSSUM indicated significantly fewer than expected deaths in all deciles of risk for both models, with overall O E ratios of 0.25 (0.20-0.32 CI) for POSSUM and 0.54 (0.47-0.62 CI) for P-POSSUM.
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Most early studies relied on standardized mortality ratios calculated for samples recruited from psychiatric services.
We used data from more than two million Dutch hospital discharges to explore the differences between hospital standardised mortality ratios calculated by using either in-hospital mortality, 30 days post-admission mortality, or 30 days post-discharge mortality.
The standardized mortality ratio (SMR) calculated in Table 2 was calculated using the APACHE II Risk of Death.
The standardized mortality ratio was calculated from the age-specific mortality rate in Dar-es-Salaam Dar-es-Salaam Dar-es-SalaamBureau of sourceTanzania
Predicted and actual mortality rates, and standardized mortality ratio were calculated.
The age and sex standardized mortality ratio was calculated using mortality in the DSS as a reference [ 23].
Standardized mortality ratio was calculated as the ratio between the observed SAPS II score and predicted mortality rate.
Similar to our results, but with a related metric, a low dormancy: mortality ratio was calculated for canola crop wild hybrids, while a high dormancy: mortality ratio was found in its wild relative (Adler et al. 1993).
The standard mortality ratio was calculated by comparing the mortality among the users with the mortality in a comparable group (5-year-age groups, gender, ethnic background) in the general Amsterdam population.
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