TY - JOUR
T1 - Assessing the perceived impact of diabetes on quality of life
T2 - psychometric validation of the DAWN2 Impact of Diabetes Profile in the second Diabetes MILES - Australia (MILES-2) survey
AU - Holmes-Truscott, Elizabeth
AU - Skovlund, Soren E
AU - Hendrieckx, Christel
AU - Pouwer, Frans
AU - Peyrot, Mark
AU - Speight, Jane
PY - 2019/4
Y1 - 2019/4
N2 - AIMS: To investigate the validity and reliability of the 6-item DAWN2 Impact of Diabetes Profile (DIDP), and the modified 7-item DIDP, which includes assessment of dietary freedom.METHODS: The online, cross-sectional, Australian MILES-2 survey included the DIDP and other validated measures, to examine convergent, discriminant and known-groups validity. The DIDP was completed by 2,207 adults with diabetes (Type 1: n=1,012; Type 2 insulin: n=504; non-insulin: n=691). Data were subjected to exploratory factor analysis, internal consistency reliability and univariate statistics, conducted separately by diabetes type/treatment.RESULTS: The DIDP was highly acceptable: 99% completion rate. One-factor solutions were supported for the 6-item and 7-item DIDP scales, in all diabetes type/treatment groups (variance explained range: 6-item: 59%-67%, 7-item: 55%-62%), with satisfactory internal consistency (α=0.85-0.90). Known-groups validity was demonstrated, by diabetes type and complications presence/absence, as was satisfactory convergent and discriminant validity.CONCLUSIONS: The DIDP meets the need for a brief, contemporary, valid and reliable measure of the perceived impact of diabetes on quality of life, suitable for adults with Type 1 or Type 2 diabetes mellitus. The 6-item and 7-item scales have psychometric equivalence. Use of the seventh item can be informed by research questions.
AB - AIMS: To investigate the validity and reliability of the 6-item DAWN2 Impact of Diabetes Profile (DIDP), and the modified 7-item DIDP, which includes assessment of dietary freedom.METHODS: The online, cross-sectional, Australian MILES-2 survey included the DIDP and other validated measures, to examine convergent, discriminant and known-groups validity. The DIDP was completed by 2,207 adults with diabetes (Type 1: n=1,012; Type 2 insulin: n=504; non-insulin: n=691). Data were subjected to exploratory factor analysis, internal consistency reliability and univariate statistics, conducted separately by diabetes type/treatment.RESULTS: The DIDP was highly acceptable: 99% completion rate. One-factor solutions were supported for the 6-item and 7-item DIDP scales, in all diabetes type/treatment groups (variance explained range: 6-item: 59%-67%, 7-item: 55%-62%), with satisfactory internal consistency (α=0.85-0.90). Known-groups validity was demonstrated, by diabetes type and complications presence/absence, as was satisfactory convergent and discriminant validity.CONCLUSIONS: The DIDP meets the need for a brief, contemporary, valid and reliable measure of the perceived impact of diabetes on quality of life, suitable for adults with Type 1 or Type 2 diabetes mellitus. The 6-item and 7-item scales have psychometric equivalence. Use of the seventh item can be informed by research questions.
KW - Patient-reported outcomes
KW - Psychosocial issues
KW - Quality of life
KW - Reproducibility of Results
KW - Cross-Sectional Studies
KW - Humans
KW - Middle Aged
KW - Australia/epidemiology
KW - Male
KW - Psychometrics
KW - Diabetes Mellitus, Type 2/epidemiology
KW - Young Adult
KW - Adolescent
KW - Quality of Life
KW - Adult
KW - Female
KW - Perception
KW - Surveys and Questionnaires
KW - Aged
KW - Research Design
UR - http://www.scopus.com/inward/record.url?scp=85063465126&partnerID=8YFLogxK
U2 - 10.1016/j.diabres.2019.03.020
DO - 10.1016/j.diabres.2019.03.020
M3 - Journal article
C2 - 30880093
SN - 0168-8227
VL - 150
SP - 253
EP - 263
JO - Diabetes Research and Clinical Practice
JF - Diabetes Research and Clinical Practice
ER -