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Table 4 Validation sample stratification and weights

From: Validation of a method for identifying nursing home admissions using administrative claims

Stratification group Validation sample size (n = 150) Study population size (n = 520,260) Probability of selection Weight
First nursing home residence month with "PROBABLE" evidence 50 27,668 0.001807 553.36
First nursing home residence month with "POSSIBLE" evidence 50 8,970 0.005574 179.40
All months with "UNLIKELY" evidence 50 483,622 0.000103 9,672.44