Optimism and pessimism in children with cancer and healthy children: confirmatory factor analysis of the youth life orientation test and relations with health-related quality of life.
OBJECTIVE
To test the measurement equivalence of the Youth Life Orientation Test (YLOT) in children with cancer (N = 199) and healthy controls (N = 108), and to examine optimism and pessimism as predictors of children's health-related quality of life (HRQL).


METHODS
Confirmatory factor analysis (CFA) was conducted to establish the two factor structure of the YLOT and to test for metric invariance.


RESULTS
A two-factor structure for the YLOT was confirmed and found to be stable across our study groups. There were no differences in mean levels of optimism and pessimism between cancer patients and controls after controlling for race/ethnicity. Higher optimism was associated with lower self-reports of pain and better emotional/behavioral functioning, whereas pessimism was related to poorer mental health and general behavior, and greater impact on the family.


CONCLUSIONS
Optimism and pessimism appear to be differentially related to certain aspects of children's HRQL, and should be investigated separately in relation to these outcomes.
Williams
Natalie A
NA
Department of Behavioral Medicine, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105-2794, USA.
Davis
Genevieve
G
Hancock
Miriam
M
Phipps
Sean
S
D000223:Adaptation, Psychological; D000293:Adolescent; D000339:Affect; D016009:Chi-Square Distribution; D002648:Child; D005163:Factor Analysis, Statistical; D005260:Female; D006304:Health Status; D006801:Humans; D008297:Male; D009369:Neoplasms / Q000523:psychology*; D011788:Quality of Life / Q000523:psychology*; D011795:Surveys and Questionnaires; D017741:Survivors / Q000523:psychology*