PMID- 25353705
OWN - NLM
STAT- MEDLINE
DCOM- 20151110
LR  - 20191210
IS  - 1557-8593 (Electronic)
IS  - 1520-9156 (Linking)
VI  - 17
IP  - 3
DP  - 2015 Mar
TI  - Reliability, validity, and responsiveness of the Impact of Weight on 
      Self-Perceptions Questionnaire (IW-SP) in individuals with type 2 diabetes and 
      obesity.
PG  - 210-4
LID - 10.1089/dia.2014.0142 [doi]
AB  - BACKGROUND: The Impact of Weight on Self-Perceptions Questionnaire (IW-SP) 
      assesses an individual's self-perception related to his or her weight. The 
      primary objective of this study was to provide evidence of the reliability, 
      validity, and responsiveness of the IW-SP. MATERIALS AND METHODS: Study 
      participants were individuals with type 2 diabetes mellitus (T2DM) and obesity 
      enrolled in clinical weight-loss programs in the United States. Data were 
      obtained for clinical measures, IW-SP, and other patient-reported outcome 
      measures. An intraclass correlation coefficient (ICC) and Cronbach's alpha were 
      calculated for test-retest reliability and internal consistency, respectively. 
      For validity, correlations and t tests were performed. For responsiveness, 
      baseline and 6-month data for a subgroup of patients were analyzed using the 
      paired t test and calculation of effect size (ES). RESULTS: Reliability data for 
      106 study participants (mean age, 52 years; 69% female; 31% white; mean body mass 
      index, 38 kg/m(2)) yielded an ICC of 0.85 and Cronbach's alpha values of >0.89. IW-SP 
      scores were associated with obesity-related quality of life, mental health, and 
      vitality (r>0.50, P<0.001). In the subgroup (n=40) used to estimate 
      responsiveness, weight was significantly less at end point than at baseline 
      (mean, baseline=231.9 vs. end point=222.0 pounds; P<0.001; ES=0.23), and IW-SP 
      scores were significantly better than at baseline (mean, baseline=61.0 vs. end 
      point=72.1 [on a scale of 0-100]; P=0.01; ES=0.34). Mean IW-SP change scores 
      significantly discriminated between those achieving >5% body weight loss and 
      those who achieved <5% (mean change, 23.6 vs. 5.7; P=0.03). CONCLUSIONS: The 
      IW-SP has demonstrated reliability, validity, and responsiveness in individuals 
      with T2DM and obesity, thereby making it a potentially valuable tool in the 
      evaluation of weight-loss interventions targeted toward patients with T2DM.
FAU - Hayes, Risa P
AU  - Hayes RP
AD  - Global Patient Outcomes and Real World Evidence, Eli Lilly and Company , 
      Indianapolis, Indiana.
FAU - DeLozier, Amy M
AU  - DeLozier AM
LA  - eng
PT  - Evaluation Study
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20141029
PL  - United States
TA  - Diabetes Technol Ther
JT  - Diabetes technology & therapeutics
JID - 100889084
SB  - IM
MH  - Adult
MH  - Body Mass Index
MH  - Body Weight
MH  - Diabetes Mellitus, Type 2/complications/*psychology/therapy
MH  - Female
MH  - Humans
MH  - Male
MH  - Middle Aged
MH  - Obesity/complications/*psychology/therapy
MH  - Psychometrics/*methods
MH  - Reproducibility of Results
MH  - *Self Concept
MH  - Surveys and Questionnaires/*standards
MH  - United States
MH  - Weight Reduction Programs
EDAT- 2014/10/30 06:00
MHDA- 2015/11/11 06:00
CRDT- 2014/10/30 06:00
PHST- 2014/10/30 06:00 [entrez]
PHST- 2014/10/30 06:00 [pubmed]
PHST- 2015/11/11 06:00 [medline]
AID - 10.1089/dia.2014.0142 [doi]
PST - ppublish
SO  - Diabetes Technol Ther. 2015 Mar;17(3):210-4. doi: 10.1089/dia.2014.0142. Epub 
      2014 Oct 29.