^a Sampling schemes were implemented as follows: 1) by first sampling the smallest conditional selection probability in the imposed inequality and iterating upwards; 2) by first sampling the largest conditional selection probability in the imposed inequality and iterating downwards; 3) by assuming no hierarchical relationship between the conditional selection probabilities and drawing each from the prespecified bounds, independently of all other probabilities; and 4) by first randomly selecting a conditional selection probability and then sampling according to its plausible bounds, and then sampling the remaining conditional selection probabilities in order to maintain the inequality.

^b The adjusted RR estimate is the sample mean (and median) of the sampling distribution; the 95% SI was constructed from the 2.5th and 97.5th percentiles of the sampling distribution.

^c Referent: high school (RR = 1).