Assessing the influence of actinic keratosis on patients' quality of life - The AKQoL questionnaire
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Assessing the influence of actinic keratosis on patients' quality of life - The AKQoL questionnaire. / Esmann, S; Vinding, G R; Christensen, K B; Jemec, G B E.
In: British Journal of Dermatology, Vol. 168, No. 2, 2013, p. 277-83.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Assessing the influence of actinic keratosis on patients' quality of life - The AKQoL questionnaire
AU - Esmann, S
AU - Vinding, G R
AU - Christensen, K B
AU - Jemec, G B E
N1 - © 2012 The Authors. BJD © 2012 British Association of Dermatologists.
PY - 2013
Y1 - 2013
N2 - BACKGROUND: Limited knowledge is available regarding quality of life in patients with actinic keratosis (AK).OBJECTIVES: To develop and validate a disease-specific questionnaire - the Actinic Keratosis Quality of Life questionnaire (AKQoL) - to assess the quality of life of patients with AK.METHODS: Based on an extensive literature search and patient interviews, the AKQoL was developed in a stepwise approach. An initial mega-questionnaire was composed and subsequently shortened based on statistical differences between patients and controls. A test-retest was done to establish the reliability and to refine the items further. Rasch analyses were performed on the final questionnaire.RESULTS: Initially, 175 items were tested in a mega-questionnaire. The questionnaires were sent out twice and statistical analyses were made, reducing the number of questions to 18 and 10, respectively. Subsequent inter-item correlations showed that one item had only a weak correlation to the rest of the scale. This was confirmed by the Rasch model and by internal consistency as evaluated by Cronbach's coefficient alpha. Only one item was found to provide a small sex difference. A Bland-Altman plot showed excellent reliability. Items are scored on a standard 4-point Likert scale and summarized in a total score of maximum 27 points. A higher score indicates greater quality of life impairment.CONCLUSIONS: A nine-item questionnaire for patients with AK was developed. The AKQoL has three domains covering emotions, function and control and one single global item. The questionnaire's scale structure, the content and face validity, and the reliability have been established.
AB - BACKGROUND: Limited knowledge is available regarding quality of life in patients with actinic keratosis (AK).OBJECTIVES: To develop and validate a disease-specific questionnaire - the Actinic Keratosis Quality of Life questionnaire (AKQoL) - to assess the quality of life of patients with AK.METHODS: Based on an extensive literature search and patient interviews, the AKQoL was developed in a stepwise approach. An initial mega-questionnaire was composed and subsequently shortened based on statistical differences between patients and controls. A test-retest was done to establish the reliability and to refine the items further. Rasch analyses were performed on the final questionnaire.RESULTS: Initially, 175 items were tested in a mega-questionnaire. The questionnaires were sent out twice and statistical analyses were made, reducing the number of questions to 18 and 10, respectively. Subsequent inter-item correlations showed that one item had only a weak correlation to the rest of the scale. This was confirmed by the Rasch model and by internal consistency as evaluated by Cronbach's coefficient alpha. Only one item was found to provide a small sex difference. A Bland-Altman plot showed excellent reliability. Items are scored on a standard 4-point Likert scale and summarized in a total score of maximum 27 points. A higher score indicates greater quality of life impairment.CONCLUSIONS: A nine-item questionnaire for patients with AK was developed. The AKQoL has three domains covering emotions, function and control and one single global item. The questionnaire's scale structure, the content and face validity, and the reliability have been established.
KW - Aged
KW - Aged, 80 and over
KW - Female
KW - Humans
KW - Keratosis, Actinic
KW - Male
KW - Middle Aged
KW - Psychometrics
KW - Quality of Life
KW - Questionnaires
KW - Sensitivity and Specificity
U2 - 10.1111/bjd.12036
DO - 10.1111/bjd.12036
M3 - Journal article
C2 - 22962980
VL - 168
SP - 277
EP - 283
JO - British Journal of Dermatology
JF - British Journal of Dermatology
SN - 0007-0963
IS - 2
ER -
ID: 117371969