A Malay version of the Child Oral Impacts on Daily Performances (Child-OIDP) index: assessing validity and reliability.
BACKGROUND
The study aimed to develop and test a Malay version of the Child-OIDP index, evaluate its psychometric properties and report on the prevalence of oral impacts on eight daily performances in a sample of 11-12 year old Malaysian schoolchildren.


METHODS
The Child-OIDP index was translated from English into Malay. The Malay version was tested for reliability and validity on a non-random sample of 132, 11-12 year old schoolchildren from two urban schools in Kuala Lumpur. Psychometric analysis of the Malay Child-OIDP involved face, content, criterion and construct validity tests as well as internal and test-retest reliability. Non-parametric statistical methods were used to assess relationships between Child-OIDP scores and other subjective outcome measures.


RESULTS
The standardised Cronbach's alpha was 0.80 and the weighted Kappa was 0.84 (intraclass correlation = 0.79). The index showed significant associations with different subjective measures viz. perceived satisfaction with mouth, perceived needs for dental treatment, perceived oral health status and toothache experience in the previous 3 months (p < 0.05). Two-thirds (66.7%) of the sample had oral impacts affecting one or more performances in the past 3 months. The three most frequently affected performances were cleaning teeth (36.4%), eating foods (34.8%) and maintaining emotional stability (26.5%). In terms of severity of impact, the ability to relax was most severely affected by their oral conditions, followed by ability to socialise and doing schoolwork. Almost three-quarters (74.2%) of schoolchildren with oral impacts had up to three performances affected by their oral conditions.


CONCLUSIONS
This study indicated that the Malay Child-OIDP index is a valid and reliable instrument to measure the oral impacts of daily performances in 11-12 year old urban schoolchildren in Malaysia.
Department of Community Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur 50603, Malaysia. zamros@um.edu.my
Zamros Y M
ZY
Yusof
Nasruddin
N
Jaafar
D000124:Achievement; D000203:Activities of Daily Living; D002652:Child Behavior; D002675:Child, Preschool; D003753:Dental Health Surveys; D005260:Female; D006801:Humans; D008296:Malaysia / Q000453:epidemiology; D008297:Male; D009909:Oral Health / Q000145:classification; D010549:Personal Satisfaction; D015995:Prevalence; D011594:Psychometrics / Q000592:standards*; D011788:Quality of Life; D015203:Reproducibility of Results; D012572:School Health Services; D018434:Sickness Impact Profile; D012919:Social Behavior; D012938:Social Perception; D012959:Socioeconomic Factors; D013334:Students / Q000523:psychology / Q000706:statistics & numerical data; D011795:Surveys and Questionnaires; D014098:Toothache / Q000453:epidemiology / Q000523:psychology; D014505:Urban Population / Q000706:statistics & numerical data