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Quality of Life Research
Gepubliceerd in: Quality of Life Research 5/2013

01-06-2013

Measurement invariance of the SF-12 across European-American, Latina, and African-American postpartum women

Auteurs: Tamer F. Desouky, Pablo A. Mora, Elizabeth A. Howell

Gepubliceerd in: Quality of Life Research | Uitgave 5/2013

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Abstract

Purpose

The purpose of this study was to determine whether a postpartum-specific version of the SF-12 was invariant across three ethnic groups. Specifically, we examined the presence of differential item functioning (DIF) among European-American, Latina, and African-American mothers. DIF refers to differential endorsement of item responses that are not due to the construct being measured. DIF can result in biased group comparisons.

Methods

We analyzed cross-sectional data of postpartum women (n = 655) who delivered at an urban hospital in the northeast region of the USA. Multiple indicators multiple causes (MIMIC) model was used to examine differential item functioning.

Results

The analyses revealed the presence of DIF for three items: Item 1 “self-assessed general health,” item 8 “bodily pain,” and item 9 “calm and peaceful.” Only two DIF effects were meaningful based on odds ratios and on the percentage of the total effect accounted for by the DIF effect. Specifically, African-American women differentially endorsed item 8 “bodily pain” when compared to European-American women (OR = 2.11, CI95 = 1.20, 3.71) and Latinas were more likely to endorse item 9 “calm and peaceful” when compared to European-American women (OR = 2.62, CI95 = 1.64, 4.17).

Conclusion

The results of this study indicate that the SF-12 is to a great degree an invariant measure for the assessment of HRQoL among postpartum ethnically diverse women. More research is needed to examine other aspects of invariance (e.g., configural and metric) and longitudinal invariance in ethnically diverse samples. To better understand ethnic differences in health, future studies need to examine the factors that may underlie DIF effects in quality of life.
vorige artikel The psychometric properties of the Migraine-Specific Quality of Life Questionnaire version 2.1 (MSQ) in chronic migraine patients
volgende artikel Favorable effects of explanatory illustrations attached to a self-administered questionnaire for upper extremity disorders
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Metagegevens
Titel
Measurement invariance of the SF-12 across European-American, Latina, and African-American postpartum women
Auteurs
Tamer F. Desouky
Pablo A. Mora
Elizabeth A. Howell
Publicatiedatum
01-06-2013
Uitgeverij
Springer Netherlands
Gepubliceerd in
Quality of Life Research / Uitgave 5/2013
Print ISSN: 0962-9343
Elektronisch ISSN: 1573-2649
DOI
https://doi.org/10.1007/s11136-012-0232-5

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