When a diagnostic test is used in series mode then-: (A) Sensitivity increases but the specificity decreases, (B) Specificity increases bu the sensitivity decreases, (C) Both sensitivity and specificity increases, (D) Both sensitivity and specificity decreases
Answer is B. Ref:Parks 23rd edition pg 137 When used in series: Sensitivity decreases Specificity increases PPV increases NPV decreases When used in parallel : Sensitivity increases Specificity decreases PPV decreases NPV increases