IADR Abstract Archives
Cultural Adaptation And Psychometric Measurements Of The Malaysian-OIDP Index
Objectives: Health-related quality of life instruments should be linguistically well-translated, culturally adapted and its psychometric properties re-evaluated when used on populations different from the one they were originally developed for. This study attempts to adapt cross-culturally the Oral Impacts on Daily Performances (OIDP) index and assess its reliability and validity for use in Malaysian adults.
Methods: The original OIDP questionnaire was translated from English into the Malay language and adapted culturally through a systematic approach. Then, two cross-sectional studies were carried out to assess the psychometric properties of the Malay-OIDP. The pilot study involved 306 randomly selected attendees (aged 20-50) of the University of Malaya Medical Centre and the main study comprised of conveniently selected 732 employees (aged 30-54) of the University of Malaya, Kuala Lumpur.
Results: The Malay-OIDP was shown to have excellent reliability and validity in both studies. The standardised Cronbach’s alpha coefficient was 0.94 and 0.81 in the pilot and main study respectively. Cronbach's alpha values for the self- and interviewer-administered Malay-OIDP were almost similar (0.92 and 0.95). A significant negative trend (p<0.001) was observed between the mean OIDP scores and the perception and satisfaction of oral health while a significant positive trend (p<0.001) was observed between the mean OIDP and experiences of dental pain and chewing difficulty, indicating good validity of the Malay-OIDP. The Malay-OIDP was also able to distinguish between those with and without a need for restorative (p=0.07) and prosthetic (p=0.05) treatment. Weighted kappa of 0.84 in the second study confirmed the good test-retest reliability.
Conclusions: The Malay-OIDP index has good internal consistency and validity when used among adult populations in Malaysia. Both interview and self-administered modes demonstrated high internal consistency. These indicate that the measure is valid and reliable for used in Malaysian adults.
Methods: The original OIDP questionnaire was translated from English into the Malay language and adapted culturally through a systematic approach. Then, two cross-sectional studies were carried out to assess the psychometric properties of the Malay-OIDP. The pilot study involved 306 randomly selected attendees (aged 20-50) of the University of Malaya Medical Centre and the main study comprised of conveniently selected 732 employees (aged 30-54) of the University of Malaya, Kuala Lumpur.
Results: The Malay-OIDP was shown to have excellent reliability and validity in both studies. The standardised Cronbach’s alpha coefficient was 0.94 and 0.81 in the pilot and main study respectively. Cronbach's alpha values for the self- and interviewer-administered Malay-OIDP were almost similar (0.92 and 0.95). A significant negative trend (p<0.001) was observed between the mean OIDP scores and the perception and satisfaction of oral health while a significant positive trend (p<0.001) was observed between the mean OIDP and experiences of dental pain and chewing difficulty, indicating good validity of the Malay-OIDP. The Malay-OIDP was also able to distinguish between those with and without a need for restorative (p=0.07) and prosthetic (p=0.05) treatment. Weighted kappa of 0.84 in the second study confirmed the good test-retest reliability.
Conclusions: The Malay-OIDP index has good internal consistency and validity when used among adult populations in Malaysia. Both interview and self-administered modes demonstrated high internal consistency. These indicate that the measure is valid and reliable for used in Malaysian adults.