Table 5: Conditions given for the calculation of four types of intermethod reliability (formula: reliability = (a/b) × 100).

Reliability Conditions Total a = the smaller frequency of “positive” identification by one test b = the larger frequency of “positive” identification by the other test Point by point a = the number of cases with the same identification from both tests b = the total number of cases Occurrence a = the number of cases who tested “positive” in both tests b = the number of cases who tested “positive” at least in one test Nonoccurrence a = the number of cases who tested “negative” in both tests b = the number of cases who tested “negative” at least in one test