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Development of children's hymenoptera venom allergy quality of life scale (CHVAQoLS).

Cichocka-Jarosz E, Brzyski P, Tobiasz-Adamczyk B, Lis G, Pietrzyk JJ - Clin Transl Allergy (2013)

Bottom Line: Rho coefficients for all the subscales reached 0.8, similar results were achieved with the Cronbach alpha coefficients.The presented scale comprises high validity and reliability subscales measuring six dimensions of HRQoL related to Hymenoptera venom allergy in children and adolescents.Such information may be useful in everyday clinical practice.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Pediatrics, Polish-American Institute of Pediatrics, Jagiellonian University Medical College, Krakow, Poland. mijarosz@cyfronet.pl.

ABSTRACT

Background: Venom allergy is a rare but life-threatening disease and may have a considerable impact on the health-related quality of life (HRQoL) of patients, especially children. This paper presents development of the HRQoL scale for children and adolescents with Hymenoptera venom allergy (HVA).

Methods: The study sample consisted of 71 children, born between 1992 and 2000, who presented with a history of insect sting reaction when referred for consultation in the allergy center of Polish-American Children's Hospital, Krakow, Poland, during the period from 2000 to 2010. The initial pool of 60 items - divided into 6 domains - was prepared. The items with intercorrelations higher than 0.7 were removed from each domain and then principal component analysis was conducted for each domain separately, to provide a one-dimensional subscale for each domain. Reliability of the subscales was assessed using Cronbach alpha coefficient in terms of Classical Test Theory and with rho coefficient in terms of Item Response Theory. The multidimensionality of the scale was tested using multi-trait scaling.

Results: Three to four items from each domain were subsequently selected to constitute six subscales. Rho coefficients for all the subscales reached 0.8, similar results were achieved with the Cronbach alpha coefficients. Multi-trait method showed that the majority of the items indicated stronger correlations with their own subscales than with other subscales, which proves that our constructed subscales measure different dimensions of HRQoL.

Conclusions: The presented scale comprises high validity and reliability subscales measuring six dimensions of HRQoL related to Hymenoptera venom allergy in children and adolescents. Such information may be useful in everyday clinical practice.

No MeSH data available.


Related in: MedlinePlus

Joint category plot for set of one randomly selected item from each domain.
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Figure 1: Joint category plot for set of one randomly selected item from each domain.

Mentions: Figure 1 presents the results of MCA for one of several single items selected from each domain. The points in the figure represent centers of gravity of particular categories of the analyzed variables, i.e. the location of an average observation belonging to a given category. As all the variables are treated in this analysis as nominal ones, the ordinal hierarchy between particular categories is an effect of dependencies between categories of all variables, not their ordinal level of measurement. The arch shape observed in the figure is a consequence of the unimodal distribution of the majority of the analyzed variables [9]. Analysis of the 1st dimension of the MCA solution (which explains a higher percentage of variance of the set of variables included in the analysis) shows that the first two options of items with quasi-Likert response format are located at a greater distance than other neighboring categories of the same items, for items included in the limitations (‘regret’ items) or discomfort domains. When analyzing items from the support domains, one may note that the distance between the first two options is similar to that between other neighboring options for that item. This may be interpreted that variables with quasi-Likert response format behave as typical Likert-scaled variables, and the option related, for instance, to lack of behavior causing limitations, and exhibiting behavior that causes no limitations, should be treated as different levels of limitations.


Development of children's hymenoptera venom allergy quality of life scale (CHVAQoLS).

Cichocka-Jarosz E, Brzyski P, Tobiasz-Adamczyk B, Lis G, Pietrzyk JJ - Clin Transl Allergy (2013)

Joint category plot for set of one randomly selected item from each domain.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3750314&req=5

Figure 1: Joint category plot for set of one randomly selected item from each domain.
Mentions: Figure 1 presents the results of MCA for one of several single items selected from each domain. The points in the figure represent centers of gravity of particular categories of the analyzed variables, i.e. the location of an average observation belonging to a given category. As all the variables are treated in this analysis as nominal ones, the ordinal hierarchy between particular categories is an effect of dependencies between categories of all variables, not their ordinal level of measurement. The arch shape observed in the figure is a consequence of the unimodal distribution of the majority of the analyzed variables [9]. Analysis of the 1st dimension of the MCA solution (which explains a higher percentage of variance of the set of variables included in the analysis) shows that the first two options of items with quasi-Likert response format are located at a greater distance than other neighboring categories of the same items, for items included in the limitations (‘regret’ items) or discomfort domains. When analyzing items from the support domains, one may note that the distance between the first two options is similar to that between other neighboring options for that item. This may be interpreted that variables with quasi-Likert response format behave as typical Likert-scaled variables, and the option related, for instance, to lack of behavior causing limitations, and exhibiting behavior that causes no limitations, should be treated as different levels of limitations.

Bottom Line: Rho coefficients for all the subscales reached 0.8, similar results were achieved with the Cronbach alpha coefficients.The presented scale comprises high validity and reliability subscales measuring six dimensions of HRQoL related to Hymenoptera venom allergy in children and adolescents.Such information may be useful in everyday clinical practice.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Pediatrics, Polish-American Institute of Pediatrics, Jagiellonian University Medical College, Krakow, Poland. mijarosz@cyfronet.pl.

ABSTRACT

Background: Venom allergy is a rare but life-threatening disease and may have a considerable impact on the health-related quality of life (HRQoL) of patients, especially children. This paper presents development of the HRQoL scale for children and adolescents with Hymenoptera venom allergy (HVA).

Methods: The study sample consisted of 71 children, born between 1992 and 2000, who presented with a history of insect sting reaction when referred for consultation in the allergy center of Polish-American Children's Hospital, Krakow, Poland, during the period from 2000 to 2010. The initial pool of 60 items - divided into 6 domains - was prepared. The items with intercorrelations higher than 0.7 were removed from each domain and then principal component analysis was conducted for each domain separately, to provide a one-dimensional subscale for each domain. Reliability of the subscales was assessed using Cronbach alpha coefficient in terms of Classical Test Theory and with rho coefficient in terms of Item Response Theory. The multidimensionality of the scale was tested using multi-trait scaling.

Results: Three to four items from each domain were subsequently selected to constitute six subscales. Rho coefficients for all the subscales reached 0.8, similar results were achieved with the Cronbach alpha coefficients. Multi-trait method showed that the majority of the items indicated stronger correlations with their own subscales than with other subscales, which proves that our constructed subscales measure different dimensions of HRQoL.

Conclusions: The presented scale comprises high validity and reliability subscales measuring six dimensions of HRQoL related to Hymenoptera venom allergy in children and adolescents. Such information may be useful in everyday clinical practice.

No MeSH data available.


Related in: MedlinePlus