Table 2.

Average information provided by each of the five QLQ-C30 physical functioning items and the most informative item in the item bank for a population with mild physical problems

Item text	Average informationa
Do you have any trouble doing strenuous activities, like carrying a heavy shopping bag or a suitcase? (QLQ-C30)	0.015
Do you have any trouble taking a long walk? (QLQ-C30)	0.017
Do you have any trouble taking a short walk outside of the house? (QLQ-C30)	0.009
Do you need to stay in bed or a chair during the day? (QLQ-C30)	0.003
Do you need help with eating, dressing, washing yourself or using the toilet? (QLQ-C30)	0.005
Do you have any trouble carrying a heavy bag upstairs?	0.022

^aWeighted average Fisher information across the score range weighted by the population density function. That is, it is the average information provided by each item for the target population (patients having mild physical problems)