The Infant Toddler Quality of Life Questionnaire™ (ITQOL) was developed for use in infants and toddlers from 2-months-to-5 years of age.
There are two versions of the ITQOL - the 47-item short-form (ITQOL-SF47) and the 97-item full-length version (ITQOL). They measure the same concepts - just with fewer items.
The ITQOL complements the Child Health Questionnaire (CHQ) (see related COA instruments tab)
Raat H, Landgraf JM, Oostenbrink R, Moll HA, Essink-Bot ML. Reliability and validity of the Infant and Toddler Quality of Life Questionnaire (ITQOL) in a general population and respiratory disease sample. Qual Life Res. 2007 Apr;16(3):445-60 (PubMed Abstract)
Landgraf JM, Vogel I, Oostenbrink R, van Baar ME, Raat H. Parent-reported health outcomes in infants/toddlers: measurement properties and clinical validity of the ITQOL-SF47. Qual Life Res. 2013 Apr;22(3):635-46 (PubMed Abstract)