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Categorical values will be compared using χ test.
The primary outcome measure will be compared using χ tests and ORs.
Proportions will be compared using χ test or Fisher's exact test.
If there is significant heterogeneity in the ORs, the groups will also be compared, using χ tests, in three separate subset analyses one for each of the hospitals.
The groups then formed will be compared using χ tests for categorical variables and one-factor analysis of variance for ordinal variables.
Differences between COPD-ICP enrolees and non-enrolees will be compared using χ statistics for categorical variables and Wilcoxon rank-sum tests for continuous variables.
Similar(53)
Categorical data were compared using χ 2 tests.
Categorical variables were compared using χ test.
Frequency differences were compared using χ test.
Groups were compared using χ analysis.
Proportions were compared using χ tests.
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