Nursing Activity Score for estimating nursing care need in intensive care units: findings from a face and content validity study.

Aim: To re-evaluate the face and content validity of the Nursing Activity Score currently adopted in evaluating activities that best describe workloads in intensive care units and their weight in describing average nursing time consumption.

Background: The Nursing Activity Score calculates the amount of nursing time that each patient will require over the next 24 hours. It has been widely used around the world since its first validation in 2003.