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ORIGINAL RESEARCH ARTICLE A Survey of the Oral Health Knowledge and Practices of Pregnant Women in a Nigerian Teaching Hospital Adeniyi Abiola 1*, Agbaje Olayinka, Braimoh Mathilda 1, Ogunbanjo Ogunbiyi,
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ORIGINAL RESEARCH ARTICLE A Survey of the Oral Health Knowledge and Practices of Pregnant Women in a Nigerian Teaching Hospital Adeniyi Abiola 1*, Agbaje Olayinka, Braimoh Mathilda 1, Ogunbanjo Ogunbiyi, Sorunke Modupe 1 and Onigbinde Olubunmi 1 1 Preventive Unit, Dental Department, Lagos State University Teaching Hospital, Ikeja, Lagos, Nigeria; Peadiatric/Orthodontic Unit, Dental Department, Lagos State University Teaching Hospital, Ikeja, Lagos, Nigeria *For correspondence: Tel: Abstract To describe the self-reported oral health knowledge, attitudes and oral hygiene habits, among pregnant women receiving antenatal care at the Lagos State University teaching Hospital (LASUTH). A cross-sectional questionnaire-based survey was conducted at the LASUTH antenatal clinic during the period January June 008. Most of the respondents demonstrated a reasonable level of oral health knowledge and positive attitudes towards oral health. However, there were gaps in the oral health knowledge of the women surveyed. The relationship between the level of oral health knowledge and ethnicity (p=0.856), level of education (p=0.079), age category (p= 0.166), and trimester of pregnancy (p=0.19) were not statistically significant. In addition, the women s knowledge and attitude towards oral health was not reflected in their oral hygiene practices. There is a need to provide oral health education for pregnant women during antenatal care in order to highlight the importance of good oral health in achieving good health for both the mother and her baby (Afr J Reprod Health 011; 15[4]:14-19) Résumé Enquête sur la connaissance et les pratiques de l hygiène buccodentaire chez les femmes enceintes dans un Centre Hospitalier Universitaire nigérian. Cette enquête a pour objectif d étudier la connaissance, les attitudes de santé buccodentaire et les habitudes de l hygiène buccodentaire auto-signalées par les femmes enceintes qui reçoivent les soins prénatals dans le Centre Hospitalier de l Université de l état de Lagos (LASUTH). Une enquête transversale, basée sur les questionnaires a été menée auprès de la clinique prénatale pendant la période entre janvier et juin 008. La plupart des enquêtées ont fait preuve d un bon niveau de connaissance de santé buccodentaire et des attitudes positives envers la santé buccodentaire. Néanmoins, il y avait des vides par rapport à la connaissance de santé buccodentaire des femmes enquêtées. Le rapport entre le niveau de connaissance de santé buccodentaire et l ethnicité (p=0,856), le niveau d instruction (p=0,079), la catégorie d âge (p=0,166), et le trimestre de grossesse (p=0,19) ont été statistiquement significatif. De plus, la connaissance et l attitude chez les femmes envers la santé buccodentaire n étaient pas reflétés dans leurs pratiques de l hygiène buccodentaire. Il est nécessaire d assurer l éducation de santé buccodentaire pour les femmes enceintes pendantr les soins prénatals afin de souligner l importance d une bonne santé buccodentaire dans l accomplissement d une bonne santé à l égard de la mère et l enfant (Afr J Reprod Health 011; 15[4]: 14-19) Keywords: Oral health, knowledge, attitudes, practices, pregnant women Introduction Pregnancy is a special state for a woman which is associated with a myriad of physiological and emotional changes. In the oral cavity, various pathologies have been reported among pregnant women. 1 The exaggerated inflammatory response of the gums to bacterial plaque known as pregnancy gingivitis has been attributed to the increased secretion of gestational hormones (especially oestrogen and progesterone) during pregnancy.,3 Bacterial plaque is formed about an hour after tooth-brushing and it is the precursor of the two commonest dental diseases i.e. dental caries and periodontal diseases. Its formation can however be prevented by regular tooth-brushing, the use of dentifrices and dental education. African Journal of Reproductive Health December 011; 15(4): 14 Proper nutrition and healthy lifestyle also play a vital role in the general well being of the mother to be. The need to eat a balanced diet with a lot of fruits cannot be over-emphasised. Unfortunately the pregnant state may predispose to unhealthy habits. These habits may include a penchant for particular types of food groups to the detriment of other essential food groups and frequent unhealthy snacking habits such as licking sweets to curb nausea. The increased consumption of refined carbohydrate will provide a suitable substrate for cariogenic bacteria and may predispose to increased tooth decay in some individuals. The frequent vomiting associated with pregnancy in some women is also known to predispose to the development of dental erosion. 3 In addition to these physiological changes is the existence of cultural beliefs which may mitigate proper nutrition and the ability of these women to achieve good oral health. In recent times, the oral health of pregnant women has been gaining more interest because of the suspected association between periodontal diseases and adverse pregnancy outcomes such as premature birth, low birth weight and pre-eclampsia. 4-6 The provision of routine antenatal care is aimed at ensuring general maternal well- being and the subsequent delivery of healthy babies. However, while oral health is now accepted as an important component of general well being of pregnant women in developed countries it remains an underrated component in developing countries such as Nigeria. The purpose of the present study was to assess the knowledge, attitude and practices concerning oral health among pregnant women receiving antenatal care at the Lagos State University Teaching Hospital (LASUTH). The results obtained would serve as baseline information for planning an oral health education programme aimed at improving the oral health of pregnant women receiving care in the hospital. Specifically it would identify areas of deficiency in the women s knowledge and this would be helpful in formulating the content of the oral health messages. Methods A self administered questionnaire based survey was conducted at the antenatal clinic of the Lagos State University Teaching Hospital (LASUTH) between January and June 008. The questionnaire was developed and pre-tested on 5 pregnant women to allow for refinement of the questions in order to facilitate answering. The minimum sample size was computed using the formula n= z pq/d where p (the prevalence of women with good knowledge) was set at 50%. Thus the computed minimum sample size was 384 subjects. This was increased by 0% to 460 subjects to accommodate attrition. Questionnaires were administered to all consecutive consenting pregnant women who attended the antenatal clinic during the study period. A total of 453 questionnaires were properly completed while 7 questionnaires had several uncompleted sections and were thus discarded. The questionnaire contained four sections. The first section contained questions on the respondent s socio demographic characteristics such as age, ethnic group, and educational status. There were six questions in the second section evaluating the oral health knowledge of the respondents, four of these questions, had been used in an earlier study. 7 Two questions were on the understanding and causes of tooth decay, and the other were on gum disease. We constructed a dental knowledge score by counting the total number of acceptable answers given by the subjects, excluding responses like do not know and no answer . Thus, the dental knowledge score was in an interval scale and ranged from 0 to 6, with a higher dental knowledge score indicating better dental knowledge. The mean score for the respondent s dental knowledge was 3.0. Based on the mean score, the knowledge scores were regrouped into categories: those with good oral health knowledge and those with poor oral health knowledge. Thus a score of 4 and above was graded as good knowledge, while 3 and below was graded as poor knowledge. The third section contained ten statements concerning the importance of oral health during pregnancy, the importance of retaining natural teeth, dental service utilization, and dental health beliefs were set to explore the subject's attitudes toward oral health. The subjects were asked to indicate whether they agreed with, disagreed with, or had no comment on each of the statements. A dental attitude score was then computed for each respondent by counting the total number of statements to which the respondent displayed positive oral health attitude. The maximum achievable score was 10 with a higher score indicating a more positive attitude. Individuals with scores of 7 and above were graded as having positive attitude to oral health. The fourth section contained questions assessing the respondent s dietary and oral health practices. The data was analysed using the SPSS for Windows (version 11.0; SPSS Inc. Chicago. IL) statistical software package and was validated visually. Measures of central tendency were generated for continuous variables and frequency tables generated for categorical variables. For the purpose of analysis the level of education was categorized as low (primary education only), middle (secondary education) and tertiary (post secondary education i.e. polytechnic and African Journal of Reproductive Health December 011; 15(4): 15 university education). The chi-squared test of association, and ANOVA test were utilised where appropriate and associations and differences were considered significant when the p-values were less than Logistic regression analysis was done to identify possible factors influencing the oral health knowledge and attitudes. Results Sociodemographic features of study participants The mean age and standard deviation of our study population was 31.3 ± years (range 0-44 years). Over half (53.5%) of the respondents were primigravida while the remaining women had between 1 and 5 children. Only eight women (1.8%) had primary school education, 49 (10.8%) secondary school education, 151 (33.3%) attained a polytechnic diploma and 43 (53.6%) attended university (Table 1). On the utilization of dental services, 85 (6.9%) respondents reported ever visiting a dental facility. Table 1: Socio-demographic characteristics of study population. Socio-demographic characteristics Age category Unspecified Less than 5 years 6-35 years 36 years and above Total Level of education Unspecified Primary Secondary Polytechnic University Total Ethnic group Hausa Ibo Yoruba Total Frequency Oral health knowledge and attitudes Percentage A total of 145(3.0%) reported having heard the term dental caries while 88(19.4%) of the respondents understood the term to mean tooth decay. A smaller proportion of the respondents 34(7.5%) had heard of the term periodontal disease but only 15 of these women knew the term refers to gum disease. A large proportion of the respondents 137(30.%) consider sugar to be the cause of both tooth decay and gum disease. Table displays the perceived causes of tooth decay and gum disease among the respondents. Some of the other causes identified by the respondents include cold drinks, cigarette smoking and genetic factors. While they viewed vitamin c deficiency and incessant tooth-picking as probable causes of gum disease. Table : Perceived causes of dental caries and gum disease. Variable N % Perceived cause of dental caries Sugar/sweet foods Drinking alcohol Poor oral hygiene Do not know Perceived cause of gum disease Sugar/sweet foods Eating hard foods Drinking alcohol Bacterial Plaque Calculus/tartar Poor oral hygiene Do not know A sizeable proportion of the respondents (186 or 41.1%) could not identify one constituent of toothpaste although 115(5.4%) correctly identified fluoride as a constituent of toothpaste. Most of the respondents (67%) believe that toothpastes are useful mainly for fresh breath while 6% opine that the mouth should be cleaned at least twice daily for optimal oral health (Table 3). Table 4 provides a summary of the women s views on statements about oral health during pregnancy. Table 3: Respondents views on some oral hygiene practices Variable N % Perceived benefits of using toothpaste Makes the mouth clean and fresh Prevents Dental decay Prevents oral cancer Appropriate number of times one should clean daily to prevent dental diseases Three times a week Once a day Twice a day More than twice a day African Journal of Reproductive Health December 011; 15(4): 16 Table 4: Responses to some of the statements on oral health during pregnancy. Statement Agree (%) Disagree Uncertain (%) (%) 1. Pregnancy is a cause of gum problems 67 (14.8) 359 (79.) 7 (6.0). Dental visits are unnecessary during pregnancy 106 (3.4) 33 (71.3) 4 (5.3) 3. Pregnancy predisposes to tooth loss. 43 (9.5) 388 (85.7) (4.9) 4. Keeping the natural dentition is unimportant 5 (11.5) 376 (83.0) 5 (5.5) 5. Every painful tooth should be removed 145 (3.0) 85 (6.9) 3 (5.1) 6. Visits to the dentist are always unpleasant 41 (9.1) 386 (85.) 6 (5.7) 7. Fruits and vegetables have no effect on the teeth and gums 14 (31.3) 89 (63.8) (4.9) Dietary and oral hygiene habits A total of 36 women reported consuming fruits four or more times every week, 170 (37.5%) reported consuming vegetables at least four times a week. Conversely, 358 or 85.7% reported consuming confectionery once a week while only 4(5.3%) ingest confectionery more than four times weekly. Regarding their oral hygiene practices, almost all the women (47 or 94.%) use toothbrush for oral cleaning and 65.1% or 95 clean their mouths once daily while 34.% clean their mouths two or more times daily (Table 5). Table 5: Oral hygiene habits of study population Tools used for tooth cleaning Toothbrush Chewing stick Frequency of mouth cleaning Once daily Twice daily More than twice daily Weekly confectionery consumption 4 times 3 times Less than once a weekly n = 453 % Factors associated with oral health knowledge and attitude Table 6 displays the relationship between the respondents oral health knowledge and their sociodemographic characteristics. The relationship between level of oral health knowledge and ethnicity (p=0.856), level of education (p=0.079), age category (p= 0.166), and trimester of pregnancy (p=0.19) using proportional test (chi-square) were not statistically significant. However when comparing the mean knowledge scores using ANOVA the respondents level of education (p= 0.000) was significantly related to the respondents oral health knowledge. The more educated women appeared to have better knowledge than the less educated women. The relationship between the oral health attitude levels, and level of education (p = 0.000), ethnicity (p=0.006) were also observed to be statistically significant using the chi-square test. The more educated women displayed more positive attitudes than the less educated women. Women from the Hausa ethnic group also appeared to have more negative attitudes that the other tribes. The relationship between mean attitudinal scores and ethnicity (p = 0.761) age category (p = 0.458), trimester of pregnancy (p = 0.608) and parity (p = 0.463) were not statistically significant using ANOVA. Following logistic regression analysis, educational status of the respondent was observed to be the most important predictor of oral health attitude (β= p=0.001). Thus for every unit increase in educational status the odds for having poor oral health knowledge reduces by 83%. None of the socio-demographic variables were significantly related to oral health knowledge. Discussion There is no gainsaying the fact that good oral health during pregnancy is important especially in view of the recent suggestions that poor oral health may result in unfavourable pregnancy outcomes. This is important in Nigeria because of the high maternal mortality rates. The commonest oral disease during pregnancy (i.e. periodontal disease) is preventable by the institution of simple measures such as regular tooth-brushing and flossing. However such positive behaviour would be influenced by the individual s oral health knowledge and attitudes. While studies have been conducted on this topic in Nigeria in the past the most recent survey was conducted over a decade ago. Thus, this study was designed to provide a snapshot view of the oral health knowledge attitude and practices of a sample of pregnant women in a Nigerian tertiary health facility. Overall, the respondents in the present survey displayed average oral health knowledge and positive African Journal of Reproductive Health December 011; 15(4): 17 Table 6: relationship between socio-demographic characteristics of respondents an their oral health knowledge and practices Socio-demographic characteristics Knowledge Mean Attitude knowledge Good Poor scores Positive Negative No % No % No % No % Mean attitude scores Age category Less than 5 years 6-35 years 36 years and above Level of education Primary Secondary Polytechnic University Ethnic group Hausa Ibo Yoruba Trimester First Second Third χ = 3.59 p = χ = 8.36 p = χ = 1.33 p = χ = 3.04 p = F=1.771 p= F=6.789 p=0.00** F=1.197 p= F=1.114 p= χ = 0.55 p = χ = 31.9 p = 0.000** χ = p = 0.006** χ = 0.38 p = *For the purposes of analysis those who did not complete the information were excluded hence the difference in total; **statistically significant result F=0.781 p= F= p=0.000** F= p=0.000** F=1.977 p=0.608 attitudes to oral health as observed in similar studies 8-10 conducted in developed countries. This may be attributed to the fact that the study participants were highly educated. This is not surprising because the study was conducted in a health facility located in the economic nerve centre of the country. A good number correctly identified the cause of dental decay but only a small percentage knew the cause of periodontal disease. Many respondents erroneously selected sugar or sweet foods as the cause of periodontal disease. This misconception needs to be addressed particularly because studies indicate that periodontal disease is the commonest dental disease affecting pregnant women in Nigeria. 11,1 In general, there is still room for improvement in the oral health knowledge of the respondents. Although there was a significant relationship between mean knowledge scores and the level of education this result should be viewed with caution because of the small number of respondents who reported having no education or attending only primary school. The respondents expressed some interesting views about oral health. For instance, a third of the respondents agreed that every painful tooth should be removed and that fruits and vegetable have no impact on the dental tissues. These views are contrary to the principles of achieving good oral health and may be related to cultural beliefs about oral health in the Nigerian society. There is a need to inform pregnant women on the role of good nutrition on oral health as well as the available treatment options for painful gums and teeth in future oral health education sessions. African Journal of Reproductive Health December 011; 15(4): 18 Overall, most of the women included displayed positive attitudes to oral health which was not surprising considering the fairly good oral health knowledge displayed. Ethnic group and level of education were observed to be significantly related to the women s oral health attitudes. The small proportion of Hausa women in the present study could be a source of bias. Thus to validate this result further studies using an evenly distributed population in terms of ethnic grouping and level of education is suggested. Interestingly however, the good knowledge and attitudes displayed were not fully reflected in the women s oral health practices. While a good proportion of the respondents believe that the mouth should be cleaned twice daily to prevent dental diseases less than a t
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