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Creation of a Czech knowledge questionnaire for patients with diabetes mellitus: evaluation of items‘ difficulty and its internal

Kristýna Šoukalová*, Martin Prázný**, Barbora Doležalová***,****, Marie Holubová*

* University of Pardubice, Faculty of Health Studies, Department of Nursing
** Charles University, 1st Faculty of Medicine, 3rd Department of Internal Medicine and General University Hospital in Prague
*** University of Pardubice, Faculty of Health Studies, Department of Clinical Sciences
**** IDE CR s. r. o.

Abstract

ŠOUKALOVÁ, K. – PRÁZNÝ, M. – DOLEŽALOVÁ, B. – HOLUBOVÁ, M. Creation of a Czech knowledge questionnaire for patients with diabetes mellitus: evaluation of items‘ difficulty and its internal. In Ošetrovateľstvo: teória, výskum, vzdelávanie [online], 2020, vol. 10, no. 1, pp. 8-17. Available on: http://www.osetrovatelstvo.eu/archiv/2020-rocnik-10/cislo-1/tvorba-ceskeho-znalostniho-dotazniku-pro-pacienty-s-diabetem-mellitem-vyhodnoceni-obtiznosti-polozek-a-jeho-vnitrni-konzistence.

Aim: To describe the process of two final phases of creating a knowledge questionnaire for patients with type 1 diabetes mellitus (DM1T) and type 2 diabetes mellitus (DM2T), which consisted in evaluating the difficulty of its items and its internal consistency.

Methods: The last phase of data collection for calculating the difficulty of items and the internal consistency of the questionnaire took place in the period 08–11/2018. From the results obtained from 258 patients (DM2T 226; DM1T 32), the difficulty of the questionnaire items was evaluated by calculating the value of difficulty Q (value 0 = simple item; value 1 = difficult item). The reliability of the created tool was evaluated by calculating the coefficient of internal consistency according to the formula Kuder-Richardson 20 (minimum acceptable value 0.7).

Results: The difficulty values of the items ranged from 0.24–0.72. According to generally accepted recommendations, none of the items falls into the area of extremely simple or extremely difficult items. The internal consistency for the individual parts of the questionnaire ranged from 0.70–0.88.

Conclusion: The items of the newly created knowledge questionnaire can be evaluated as average difficult based on the calculation of the difficulty from the data obtained from the respondents. All parts of the questionnaire reached a minimum acceptable value of internal consistency. The created questionnaire is verified and suitable for use in Czech-speaking patients.

Key words: diabetes mellitus, questionnaire, knowledge, item, difficulty, internal consistency

Full text (Slovak language)

Contact

Mgr. Kristýna Šoukalová

Katedra ošetřovatelství FZS UP
Průmyslová 395
532 10 Pardubice
Česká republika
E-mail: Kristyna.Soukalova@upce.cz

Received: 12th Maj 2020
Accepted: 21st April 2020