Protocol for manual intramuscular needle placement checked by PSRM
PPV or precision
This table will be used to calculate the positive predictive value (PPV), with its confidence interval of 95%, as the main objective for each individual muscle and muscle injection location. The positive predictive value or precision is defined as the proportion of true positive results against all the positive results, both true positives and false positives. In addition, negative predictive value (NPV), sensitivity and specificity will also be computed, with their confidence intervals of 95%.