IADL Indexs Used in Korea. Relationship Among Korean Version of Lawton IADL Index, Korean Version of Bathel ADL Index and K-IADL Index

BACKGROUND: The IADL indexes used in Korea were Korean version of Lawton Index(Lawton index), Korean instrumental activities of daily living index(K-IADL), Korean version of Bathel index(Bathel index). The purposes of this study are to compare the reliability, validity, distribution of these IADL indexes and examine the predicting ability of these measures to disability grading. METHODS: 147 patients with disability participated in the study. The patients were tested with Lawton index, K-IADL, Bathel index. The distribution, internal consistency, concurrent validity of each measures were examined. Predicting ability of these measures to disability grading was tested by comparing the mean of each measures according to Brain disability grading. RESULTS: Lawton index, K-IADL, Bathel index had acceptable and similar psychometric characteristics[high internal consistency(>0.8), high concurrent validity(Spearman's correlation coefficient, r&0.5; intraclass correlation coefficient >0.5)]. Each measures showed acceptable distribution, But K-IADL had right skewed distribution than other indexes. Predicting ability of these measures to disability grading was comparable among three IADL indexes CONCLUSION: Lawton index, K-IADL, Bathel index had acceptable and similar psychometric characteristics and discriminative ability to disability grading.

The Validity and Reliability of Korean Version of Karz ADL Index

BACKGROUND: The functional status of elerly has been measured by mamy measures including Karz ADL index, Karz ADL index and physical self-maintenace scale. Amon them, Karz ADL index has been widely used in many countries because of easiness to scoring and adminstration. So we translated Karz ADL index and tested the translation validity, psychometric properties(validity and reliability) of Korean version of Karz ADL index. METHODS: The Karz ADL index was translated by multidisciplinary committee members. The quality of translation was rated by committee members using three criteria(clarity, use of common language, conceptual equivalence). Reliability was tested by internal consistency(Cronbach's alpha), two weeks test-retest reliability, intraobserver agreement. Clinical validity and construct validity comparison with brain disability grade were tested for validity testing. RESULTS: Cronbach's alpha was 0.90. 2 weeks test-retest correlations coefficient was 0.94(p=0.00). Interrator agreements were high in all 10 items( =0.79 0.96). Normal control group had lower scores than patients group(p=0.000). Correlation coefficients between Korean version of Karz ADL index score and brain-disability grade was -0.68(p=0.000). CONCLUSION: Korean version of Karz ADL index is a valid and reliable instrument for measuring functional status of elderly.

The Validity and Reliability of Korean Version of Bathel ADL Index

BACKGROUND: The functional status of elderly has been measured by many different methods including Karz ADL index, Bathel ADL index and physical self- maintenance scale. Among them, Bathel ADL index has been widely used in many countries because of easiness to scoring and administration. Therefore, we translated the Bathel ADL index and tested the translation validity and psychometric properties (validity and reliability) of Korean version of Bathel ADL index. METHODS: The Bathel ADL index was translated by multidisciplinary committee members. The quality of translation was rated by committee members using three criteria (clarity, use of common language, conceptual equivalence). Reliability was tested by internal consistency (Cronbach's alpha), two weeks test-retest reliability, and intraobserver agreement. Clinical validity and construct validity comparison with brain disability grade were tested for validity testing. RESULTS: Cronbach's alpha was 0.97. Two weeks test-retest correlations coefficient was 0.95 (P=0.00). Interrator agreements were high in all 10 items (kappa=0.82~1.0). Normal control group had lower scores than the patient group (P=0.000). Correlation coefficients between the Korean version of Bathel ADL index score and brain- disability grade was -0.58 (P=0.000). CONCLUSION: The Korean version of Bathel ADL index is a valid and reliable instrument for measuring functional status of the elderly.