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Abstract Background Psychometric investigations of tools used in the screening of migraine including the migraine screen questionnaire (MS-Q), using an adequate statistical approach is needed. We assessed the psychometric properties of the migraine screen questionnaire (MS-Q) using categorical data methods. Material and methods A total of 343 students at Mizan-Tepi University, Ethiopia, age range = 18–35 years were selected by a simple random sampling method to participate in a cross-sectional study. The respondents completed the MS-Q, a semi-structured socio-demographic questionnaire, and a visual analog scale for attention (VAS-A). Results The cumulative variance rule (> 40%), the Kaiser’s criteria (Eigenvalue> 1), the Scree test and, the parallel analysis (minimum rank) identified a 1-factor model for the MS-Q with the factor loadings in the range of 0.78 to 0.84. Fit indices favored a 1-factor model of the MS-Q as indicated by comparative fit index (0.993), weighted root mean square residual (0.048), root mean square error of approximation (0.067), the goodness of fit index (1.00), and non-normed fit index (0.987). The values of the Factor Determinacy Index (0.953), marginal reliability (0.909), H-latent (0.909), H-observed (0.727), explained common variance (0.906) and the mean item residual absolute loadings (0.225) further complimented finding of the 1-Factor model. McDonald’s Omega (0.903) suggested adequate internal consistency. Discriminative validity was supported by significantly higher scores for the total and all the MS-Q items except one among those with complaints of attention. Conclusion The categorical methods support the psychometric validity of the MS-Q in the study population.

Abstract Background Dental anxiety is one of the most common fears that can eventually lead to avoidance of dental care. Knowing how students will respond to dental treatment will aid in increasing their awareness of oral health and overcoming this fear. The present study measured the prevalence of dental anxiety among dental, medical, and nursing students in Riyadh city, Kingdom of Saudi Arabia. Methods A cross-sectional study including undergraduate dental, medical, and nursing students at King Saud University and Almajmaa University was conducted to assess dental anxiety using the Modified Dental Anxiety Scale. Descriptive statistics including means, standard deviations, and percentages were calculated. Group comparisons were analyzed using t-tests and analysis of variance. Multiple group comparisons were conducted using Tukey’s post-hoc test. P

Abstract Background Daytime sleepiness is highly prevalent across the globe. The Epworth sleepiness scale (ESS) is the most widely used tool for screening daytime sleepiness. The psychometric properties of the ESS have not been comprehensively examined in African populations. Material and methods A cross-sectional design with simple random sampling was used in the present study. The study recruited 600 students from Mizan-Tepi University, Ethiopia, of which 329 (age = 18–28 years and body mass index = 21.19 ± 3.17 kg/m2) completed the study. ESS, a semi-structured socio-demographics questionnaire and a clinical interview to diagnose insomnia according to the International Classification of Sleep Disorders were employed. Results All except one item of the ESS showed a floor effect, while only one item score showed ceiling effect. However, no ceiling/floor effect was observed in the ESS total score. The Cronbach’s alpha (0.75) and composite reliability (0.75), indicated good internal consistency, while a moderate item-total score correlation (r = 0.55–0.67) implied favorable internal homogeneity. The known-group validity was established by significantly higher scores for all the ESS item scores and the ESS total scores among those with symptoms of insomnia than among non-symptomatic students. Fit indices along with the consideration of inter-factor correlation coefficient, measures of item retention favored the unidimensional structure of the ESS. Conclusion The ESS has excellent psychometric validity for screening daytime sleepiness in Ethiopian university students.

Abstract Background Predisposing factors for metacognitive dysfunctions are common in university students. However, there is currently no valid questionnaire instrument designed to assess metacognitive aspects including meta-memory and meta-concentration in students. To address this need, the present study investigated the psychometric validity of a brief questionnaire, the Mizan meta-memory and meta-concentration scale for students (MMSS) in university students. Materials and methods A cross-sectional study with simple random sampling was conducted among students (n = 383, age = 18–35, body mass index = 21.2 ± 3.4 kg/m2) of Mizan-Tepi University, Ethiopia. MMSS, a socio-demographics questionnaire, and the Epworth sleepiness scale (ESS) were employed. Results No ceiling/floor effect was seen for the MMSS global and its sub-scale scores. Confirmatory factor analysis showed that a 2-Factor model had excellent fit. Both, the comparative Fit Index (CFI) and goodness of fit index were above 0.95, while both the standardized root mean square residual and root mean square error of approximation (RMSEA) were less than 0.05, while χ2/df was less than 3 and PClose was 0.31. The 2-Factor MMSS model had adequate configural, metric, scalar, and strict invariances across gender groups as determined by a CFI > .95, RMSEA