A pilot study to assess oral health literacy by comparing a word recognition and comprehension tool

Impact of an Oral Health Education Program on the Oral Health Literacy of Refugees

Inadequate comprehension of healthcare information contributes to poor health outcomes. Ethnic minorities are one of the populations most affected by low health and oral health literacy (OHL). The hypothesis of the current study was that an oral health education program (OHEP) can improve the OHL, oral health awareness and behaviors of refugees. We also hypothesized that there will be a difference between OHL in English and native language in the Pre-intervention phase. Fifty-two adult refugees participated in an educational program that included a comprehensive and culturally sensitive PowerPoint presentation and hands-on learning activities on oral health topics. The study used a cross-sectional pre-post study design. Before the program (Pre-intervention group), participants completed 2 surveys: Sociodemographic Survey and Oral Health Perceptions of Refugees in a bilingual format, and the Estimate of Oral Health Literacy-Bilingual40 (EOHL-BL40) in English, and in the participants' native language. Immediately after an OHEP (Post-intervention group), participants completed the EOHL-BL40 survey in English only. Two weeks after OHEP (Follow-up intervention), participants completed again the Sociodemographic Survey and Oral Health Perceptions of Refugees and the Estimate of Oral Health Literacy-Bilingual40 (EOHL-BL40) in English only. The mean percentage of words understood on Pre-intervention EOHL-BL40 survey were significantly higher in native languages (47.3% ±3.7%) compared with survey in English (15.3% ±1.2%, P < 0.001). Post-intervention scores, immediately after educational program, were higher (28.6% ±2.4%), P < 0.001) for survey in English compared with the Pre-intervention (15.3% ±1.2%). The follow-up (2 weeks later) scores (25.5% ±2.4) were slightly lower than Post-intervention but still significantly higher (P < 0.001) than Pre-intervention. Results for both Sociodemographic Survey and Oral Health Perceptions of Refugees surveys were similar: the OHEP positively affected oral health awareness and oral health behaviors. Results of the study suggested that OHEP may improve oral health literacy, oral health awareness, and personal oral hygiene practices of refugees.

A Pilot Study to Develop the Rapid Estimate of Adult Literacy in Audiology

Background:

Health literacy describes an individuals' ability to maximize their potential in health care, including one's ability to understand information needed to make informed health decisions. A variety of general and condition-specific health literacy assessment tools have been created to help health professionals assess patients' health literacy skills and tailor the need for health care communication or education; however, there are no such tools available for the audiology field.

Objective:

The purpose of the study was to develop an objective reading recognition audiology-related health literacy assessment tool, the Rapid Estimate of Adult Literacy in Audiology (REALA).

Methods:

This was a cross-sectional study (N = 200). The initial version of the REALA contained 99 words specifically related to audiology. The final version, revised to have improved clinical utility, contained a total of 48 words that were selected based on item difficulty, item discrimination score, and point-biserial index using classical item analysis.

Key Results:

The total pass rate for the final version of the 48-word REALA was 0.72 (standard deviation = 0.45) and the Cronbach coefficient alpha was 0.93. Once the comprehension component is added to the tool, the REALA can be a valuable health literacy assessment tool that health professionals use to evaluate patients' audiology-related health literacy.

Conclusion:

Once the comprehension component is added to the tool, the REALA can be a valuable health literacy assessment tool that health professionals use to evaluate patients' audiology-related health literacy. [HLRP: Health Literacy Research and Practice. 2022;6(2):e88–e95.]

Plain Language Summary:

A health literacy assessment tool, the REALA, was developed in the study. The final version of REALA contained 48 words relative to hearing healthcare. The results suggested that REALA can help health professionals assess patients' hearing related health literacy and tailor the need for hearing health care communication or education.

Cross-cultural adaptation and validation of Malay version of Rapid Estimate of Adult Literacy in Dentistry (MREALD-30) among Orang Asli population in Malaysia

BACKGROUND

The aim of this study was to adapt, translate and validate the Rapid Estimate of Adult Literacy in Dentistry (MREALD-30) instrument for the Orang Asli population in Malaysia.

METHODS

After translation and cross-cultural adaptation, interviews were conducted with 326 participants of the Temuan tribe from village Kampung Tering in Johol, Negeri Sembilan, Malaysia. The instrument's validity was assessed using the scores of MREALD-30, which were compared based on occupation, monthly household income, educational attainment, general literacy, use of dental services, and three dental outcomes. A questionnaire containing socio-behavioral information and validated Malay Oral Health Impact Profile (M-OHIP-14) was also administered. The reliability of the MREALD-30 was assessed by re-administering it to 30 subjects after two weeks. Its correlations evaluated convergent and discriminative validity of MREALD-30 with the level of education and dental visiting habits, monthly household income, respectively. Predictive validity was assessed with M-OHIP-14, while construct validity was evaluated by exploratory factor analysis using the Rasch model.

RESULTS

The internal consistency of the MREALD-30 measured by Cronbach's alpha was 0.89. The test-retest reliability was excellent (ICC 0.95, k = 0.85). MREALD-30 exhibited good construct validity. Rasch analysis showed two factors, and infit mean-square statistics for MREALD-30 were all within the desired range of 0.50-2.0. The discriminant validity and predictive validity were statistically significant (p < 0.05).

CONCLUSIONS

MREALD-30 showed very strong reliability, good construct, discriminant, and predictive validity, but poor convergent validity. Overall, it showed good psychometric properties and can be used in these community settings.

Health Literacy and Parental Oral Health Knowledge, Beliefs, Behavior, and Status Among Parents of American Indian Newborns

OBJECTIVE

To examine the relationship between health literacy (HL) and parental oral health knowledge, beliefs, behavior, and self-reported oral health status (OHS) among parents of American Indian (AI) children.

METHODS

This analysis used baseline data from a randomized controlled trial that tested an oral health intervention with parents of AI newborns. Participants were recruited in parent-child dyads (N = 579). Parents completed items assessing sociodemographic characteristics, HL, and parental oral health knowledge, beliefs, behavior, and self-reported OHS. We examined the correlation of HL with each oral health construct, controlling for parent age and income.

RESULTS

On average, parents felt quite confident in their HL skills, performed well on questions assessing parental oral health knowledge, and endorsed beliefs likely to encourage positive parental oral health behaviors (e.g., confidence that one can successfully engage in such behaviors). Parents with more limited HL had significantly less knowledge, perceived cavities to be less severe, perceived more barriers and fewer benefits to recommended oral health behaviors, were less confident they could engage in these behaviors, and were more likely to believe their children's oral health was under the control of the dentist or a matter of chance (P values < 0.001). Limited HL was not associated with behavior (P > 0.05) but was linked to worse self-reported OHS (P = 0.040).

CONCLUSIONS

HL was associated with parental oral health knowledge, beliefs, and self-reported OHS. Oral health education interventions targeting AI families should facilitate development of knowledge and positive oral health beliefs among parents with more limited HL skills.

The association between oral health literacy and oral health behaviors in North Korean defectors: a cross-sectional study

Background

The present study aimed to investigate the association between oral health literacy and oral health behaviors among North Korean defectors.

Methods

This study involved the collection of self-reported questionnaires from 123 North Korean defectors visited a dental clinic that offered complimentary services, to receive dental treatment in a metropolitan area of South Korea from December 2017 to April 2018. Oral health literacy was measured with the Test of Korean Functional Health Literacy in Dentistry (TOKFHLiD), which consists of 30 items concerning verbal oral health literacy and 42 items concerning functional oral health literacy (28 items for reading comprehension and 14 items for numeracy). In addition, the questionnaire contains 15 and 14 items related to demographic characteristics and oral health behaviors (interest, lifestyle, diet, prevention), respectively, for a total of 101 items.

Results

The mean oral health literacy score was 44 (out of a maximum possible score of 72). Oral health literacy and oral health behaviors were positively correlated (r = 0.526, P < 0.001), and oral health literacy also had a significant effect on oral health behaviors (Beta = 0.26, 95% CI: 0.04–0.33). However, although functional oral health literacy had a significant effect on oral health behaviors (Beta = 0.20, 95% CI: 0.01–0.43), verbal oral health literacy did not (Beta = 0.13, 95% CI: − 0.06-037).

Conclusions

Educational interventions are needed to improve oral health literacy, and thus oral health behaviors, as a part of the health promotion measures undertaken to facilitate the stable adjustment of North Korean defectors in South Korean society.

Building a new scale to measure worries about oral hygiene self-management in vulnerable older adults

OBJECTIVE

This paper describes a new scale to measure worries about self-management of oral hygiene in low-income older adults.

BACKGROUND

Oral hygiene that prevents oral diseases and worsening of chronic conditions improves with instruction, but other cognitive/emotional factors impede oral hygiene practice especially among older adults. Many scales measure dental anxiety, but none measures oral hygiene self-management worries.

MATERIALS AND METHODS

Formative research with diverse older adults 55-95 in low-income housing identified scale items. A 23-item scale was tested in a pilot intervention study (n = 84) and formalised with a new sample (N = 331).

RESULTS

In both studies, PCA/factor analysis produced two subscales: (a) worries about cleaning teeth and (b) consequences of cleaning. Chronbach's alpha coefficient evaluated internal consistency, and Pearson's r and Kendall tau/Spearman's rho evaluated scale predictability, convergent and divergent validity. The scale and subscales showed good internal consistency in both studies (over 0.90) and stability T0 0.90; T1: 0.90). In the larger sample, statistically significant correlations between the scale, subscales; plaque score, and similar scales (perceived risk of oral health problems, and fears of oral diseases) demonstrated convergent validity. For divergent validity, the worries scale, not the GOHAI, a similar scale measuring oral health life quality, was associated with Plaque Score. Each scale was associated with different mediators suggesting different constructs.

CONCLUSION

The overall scale has good internal consistency, test-retest reliability, predictability and convergent and divergent validity. It captures a psycho-emotional construct useful in oral health research and hygiene education with older adults.

Association of oral health behavior and the use of dental services with oral health literacy among adults in Tehran, Iran

Objective:

To assess the association of oral health behavior (OHB) and the use of dental services with oral health literacy (OHL) among Iranian adults.

Methods:

This was a cross-sectional population study of a random sample of 1031 adults aged 18–65 in Tehran, Iran. We collected data on tooth brushing frequency, the consumption of sugary snacks and beverages, and time since last dental visit. To measure OHL, we used a validated OHL adults’ questionnaire (OHL-AQ). In addition to descriptive analysis, we used multiple logistic regression models to assess the association of OHB and the most recent dental visit with OHL while controlling for socioeconomic and demographic factors.

Results:

The participants’ mean age was 36.3 (standard deviation 12.9), and 51% were women. Of the participants, 81.3% reported brushing their teeth daily (≥1/day), 37.6% consumed sugary snacks or beverages between meals less than once daily (<1/day), and 36.8% used dental services within the past 6 months. In the adjusted models, high OHL scores significantly correlated with daily (≥1/day) tooth brushing (odds ratio [OR] = 1.97, 95% confidence interval [CI]: 1.30–2.98), the consumption of sugary snacks or beverages (<1/day between meals) (OR = 1.56, 95% CI: 1.13–2.15) and the recent use of dental services (≤6 months) (OR = 1.59, 95% CI: 1.15–2.21), respectively.

Conclusions:

OHL relates significantly to improved OHB and the use of dental services. Oral health promotion programs should, therefore, take into account improvements in adults’ OHL, particularly in countries with developing health-care services.

Evaluation of the psychometric properties of the Brazilian version of the Oral Health Literacy Assessment in Spanish and development of a shortened form of the instrument

OBJECTIVE

The objective of this study was to investigate the psychometric properties of the Oral Health Literacy Assessment in Spanish (OHLA-S) for the Brazilian-Portuguese language using robust analysis and with the results disclose possibilities to develop a shorter and more valid instrument.

METHODS

OHLA-S is an oral health literacy instrument comprising a word recognition section and a comprehension section. It consists of 24 dental words. It was translated into the Brazilian-Portuguese language (OHLA-B) and its psychometric properties were evaluated in a random sample of 250 adults aged 20-59 years. To assess the dimensionality and factor structure were tested by means of Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA). Reliability was assessed using two indicators: Cronbach's alpha and McDonald's Omega.

RESULTS

EFA and CFA demonstrated that the OHLA-B with 24 items did not present an adequate adjustment of the model, compromising its validity. In addition, reliability values at 0.50 for Cronbach's alpha and 0.67 for McDonald's omega were below the minimum acceptable rate of 0.70. As no support was found for the original structure, we decided to proceed with the withdrawal of individual items and successive reanalysis of the model until the indicators were adjusted in a shorter instrument. A new structure with 15 items produced an instrument with two dimensions and a better goodness of fit than the original instrument. The Alpha and Omega reliability index values increased to 0.83 and 0.80, respectively, and all scores were better in the OLHA-B with 15 items than in the instrument with 24 items.

CONCLUSION

OLHA-B with the original structure composed by 24 items did not show acceptable construct validity. The shorter version with 15 items showed more promising results for assessing oral health literacy levels in the Brazilian population.

Perceptions of primary health care service users regarding dental team practices in Brazil

BACKGROUND

The Unified Health System (SUS) is the Brazilian set of public health services that offers global access to health care and disease treatments for all citizens. These services have been evaluated by means of a national survey assessing the users' perceptions.AimTo explore and characterize the SUS users' perceptions regarding primary dental team practices in the five Brazilian geographical regions.

METHODS

Descriptive study. The sample consisted of 37 262 subjects. Data were collected by means of the Ministry of Health survey, conducted between 2012 and 2014. Variables used in the present study are associated with SUS users' perspectives of satisfaction, access, and use of services. The study utilized bivariate data analysis, and dichotomous variables were derived for analysis following 95% reliability.FindingsThis study observed similarities and proportionality of perceptions in the Brazilian territory. In most macro-regions, dental teams did not develop an active search for dental treatment absentees. However, the SUS users reported very good and good perceptions, which were homogeneously distributed across five Brazilian regions, thereby showing an overall positive perception of primary dental treatment.

Associations between dental knowledge, source of dental knowledge and oral health behavior in Japanese university students: A cross-sectional study

The aim of this study was to investigate the associations between dental knowledge, the source of dental knowledge and oral health behavior in a group of students at a university in Japan. A total of 2,220 university students (1,276 males, 944 females) volunteered to undergo an oral examination and answer a questionnaire. The questionnaire assessed dental knowledge, the source of dental knowledge and oral health behavior (e.g., daily frequency of tooth brushing, use of dental floss and regular dental checkups). The odds ratio and 95% confidence interval for oral health behavior based on dental knowledge and source of dental knowledge were calculated using logistic regression models. Of the participants, 1,266 (57.0%) students obtained dental knowledge from dental clinics, followed by school (39.2%) and television (29.1%). Logistic regression analyses indicated that use of dental floss was significantly associated with source of dental knowledge from dental clinics (P = 0.006). Receiving regular dental checkups was significantly associated with source of dental knowledge; the positive source was dental clinic (P < 0.001) and the negative sources were school (P = 0.004) and television (P = 0.018). Dental clinic was the most common source of dental knowledge and associated with better oral health behavior among the Japanese university students in this study.

The value of a combined word recognition and knowledge measure to understand characteristics of our patients' oral health literacy

OBJECTIVE

The objective of the analysis was to examine the association between sociodemographic and dental understanding and utilization characteristics and lower oral health literacy (HL) and knowledge.

METHODS

The cross-sectional Multicenter Oral Health Literacy Research Study (MOHLRS) recruited and interviewed 923 English-speaking, initial care-seeking adults. The questionnaire included participant sociodemographic characteristics, measures of the participant's understanding and utilization of dentistry, and two oral HL measures, the Rapid Estimate of Adult Literacy in Medicine and Dentistry (REALM-D) and the Comprehensive Measure of Oral Health Knowledge (CMOHK), which were combined into a new composite HL and knowledge measure, the MOHLR-K.

RESULTS

In adjusted multivariable analysis, persons who reported more understanding of dentist instructions had higher mean scores for all HL measures. Subjects reporting the highest level of understanding had greater scores by an average of 1.6 points for the MOHLR-K (95% CI: 0.85-2.40, P<.01), 2.11 points for REALMD-20 (95% CI: 0.75-3.48, P<.01) and 2.20 points for CMOHK (95% CI: 1.01-3.40, P<.01) after controlling for demographic and other dental understanding and utilization factors. Persons who reported history of tooth decay had higher MOHLR-K scores by an average of about 0.77 points (95% CI: 0.49-1.04, P<.01), higher REALMD-20 scores by 0.54 points (95% CI: 0.12-0.95, P=.01) and higher CMOHK scores by 1.22 points (95% CI: 0.82-1.63, P<.01) as compared to persons without tooth decay history after controlling for the other factors. Persons who had support all of the time for travel to the dentist had higher scores by an average of about 0.5 points for the MOHLR-K (95% CI: 0.04-0.96, P=.03) and about 0.89 points for the REALMD-20 (95% CI: 0-1.79, P=.05) as compared to subjects with no support after controlling for other factors. Report of periodontal history, financial challenges to delay a dental visit and dental utilization were not significantly associated with any of the HL measures once the other factors were adjusted for in the model.

CONCLUSION

The analysis confirmed that pronunciation of medical and dental terms may not fully reflect comprehension and revealed that understanding both patients' sociodemographic and dental understanding and utilization factors, such as transportation to the dental office associated with lower oral HL and knowledge, could help the profession develop appropriate clear language programmes to improve access to dental care for vulnerable populations.

Reliability and validity of the Turkish version of the Rapid Estimate of Adult Literacy in Dentistry (TREALD-30)

OBJECTIVE

To culturally adapt the Turkish version of Rapid Estimate of Adult Literacy in Dentistry (TREALD-30) for Turkish-speaking adult dental patients and to evaluate its psychometric properties.

MATERIAL AND METHODS

After translation and cross-cultural adaptation, TREALD-30 was tested in a sample of 127 adult patients who attended a dental school clinic in Istanbul. Data were collected through clinical examinations and self-completed questionnaires, including TREALD-30, the Oral Health Impact Profile (OHIP), the Rapid Estimate of Adult Literacy in Medicine (REALM), two health literacy screening questions, and socio-behavioral characteristics. Psychometric properties were examined using Classical Test Theory (CTT) and Rasch analysis.

RESULTS

Internal consistency (Cronbach's Alpha = 0.91) and test-retest reliability (Intraclass correlation coefficient = 0.99) were satisfactory for TREALD-30. It exhibited good convergent and predictive validity. Monthly family income, years of education, dental flossing, health literacy, and health literacy skills were found as stronger predictors of patients'oral health literacy (OHL). Confirmatory factor analysis (CFA) confirmed a two-factor model. The Rasch model explained 37.9% of the total variance in this dataset. In addition, TREALD-30 had eleven misfitting items, which indicated evidence of multidimensionality. The reliability indeces provided in Rasch analysis (person separation reliability = 0.91 and expected-a-posteriori/plausible reliability = 0.94) indicated that TREALD-30 had acceptable reliability.

CONCLUSION

TREALD-30 showed satisfactory psychometric properties. It may be used to identify patients with low OHL. Socio-demographic factors, oral health behaviors and health literacy skills should be taken into account when planning future studies to assess the OHL in both clinical and community settings.

Validity and Reliability of the Brazilian Version of the Rapid Estimate of Adult Literacy in Dentistry--BREALD-30

Objective

The aim of the present study was to translate, perform the cross-cultural adaptation of the Rapid Estimate of Adult Literacy in Dentistry to Brazilian-Portuguese language and test the reliability and validity of this version.

Methods

After translation and cross-cultural adaptation, interviews were conducted with 258 parents/caregivers of children in treatment at the pediatric dentistry clinics and health units in Curitiba, Brazil. To test the instrument's validity, the scores of Brazilian Rapid Estimate of Adult Literacy in Dentistry (BREALD-30) were compared based on occupation, monthly household income, educational attainment, general literacy, use of dental services and three dental outcomes.

Results

The BREALD-30 demonstrated good internal reliability. Cronbach’s alpha ranged from 0.88 to 0.89 when words were deleted individually. The analysis of test-retest reliability revealed excellent reproducibility (intraclass correlation coefficient = 0.983 and Kappa coefficient ranging from moderate to nearly perfect). In the bivariate analysis, BREALD-30 scores were significantly correlated with the level of general literacy (r_s = 0.593) and income (r_s = 0.327) and significantly associated with occupation, educational attainment, use of dental services, self-rated oral health and the respondent’s perception regarding his/her child's oral health. However, only the association between the BREALD-30 score and the respondent’s perception regarding his/her child's oral health remained significant in the multivariate analysis.

Conclusion

The BREALD-30 demonstrated satisfactory psychometric properties and is therefore applicable to adults in Brazil.