Evaluation of Oral Status and Tobacco Use in a Rural Population and Testing a Scale Developed to Rate Oral Status : A Pilot Study

The objectives of this investigation were to evaluate the oral status and tobacco use of subjects residing in rural areas to provide epidemiological data for planning oral health programs and to test a scale developed to rate oral status. A cross-sectional investigation was conducted among first-visit subjects visiting the out-patient dental clinics of two rural hospitals during a sixmonth period. Data were collected by interviews and clinical examinations. Criteria evaluated in the proposed scale were based on the status of the oral tissues in disease and health. Differences in proportions were compared using the Chi squared test and a p-value of < 0.05 was considered statistically significant. The study population comprised 614 patients (43.6% male, 56.4% female) aged between four and 80. Only 1.6% subjects had an intact dentition while 17.9% presented with a healthy periodontium. Two hundred forty-five subjects had undergone prosthetic rehabilitation. Tobacco use was reported by 13.3% subjects and they accounted for 88% of the oro-mucosal lesions observed. Once daily tooth cleansing was reported by 68.2% subjects while 2.3% did not practice any oral hygiene measures. The scale used mirrored the subjects’ oral status accurately. To conclude, the poor oral status of this population was compounded by lack of awareness about the presence of oral disease. A renewed stress on implementation of oral health promotion strategies for rural populations seems critical in the present context and the proposed scale needs to be validated by studies on larger population groups.


Introduction
Oral diseases have considerable impact on individuals and communities, as a result of the pain, suffering, impairment of function and reduced quality of life they impose (Varenne et al., 2005;WHO, 2003). In India, oral diseases have been largely neglected by health planners and, therefore, oral health-care programs have not been integrated into national and community health programs even though a National Oral Health Policy for India was drafted in 1985 (National Oral Health Policy for India, 1986), redrafted in 1995(Government of India, 1995, and strategies for implementing a pilot program were finalized in 2003 (Government of India and the All India Institute of Medical Sciences, 2003).
Serious constraints exist regarding availability and accessibility to essential oral health-care services among people living in rural areas (Varenne et al., 2005) due to geographical and economic barriers. A lack of definitive data on the oral health needs of this population is another contributing factor in the Indian context. Epidemiological data are a prime requisite to aid authorities planning health care systems especially when they represent populations that so far have had very limited access to formal oral health care (Pekiner et al., 2010).
India has the highest prevalence of oral cancer in the world, 95% of which is linked to the use of tobacco. This condition has a high morbidity and mortality; therefore, early diagnosis is crucial in ensuring patient survival. Oral cancer is always preceded by some pre-cancerous lesion or condition which can be diagnosed early since the oral cavity is easily accessible for examination (Government of India, 2005).
Oral status of any individual or population groups is usually evaluated using indices for specific oral conditions. However, there is lack of a rating scale which gives a complete picture of the oral cavity based on all conditions of disease and health.
Therefore, the objectives of this investigation were to evaluate the oral status and tobacco use of subjects residing in rural habitats and to provide epidemiological data for planning oral health programs. Also, the investigators made an attempt to test a scale which was developed to rate oral status.

Subjects:
A cross-sectional survey was conducted for a six-month period (March to August 2011) on subjects visiting the outpatient dental clinics of two rural hospitals in Karnataka State, India. These clinics are located in areas where, as of now, no data exists on the oral health needs of the population. All first-visit subjects reporting to these facilities for dental care were informed of the nature of the investigation and their consent sought. Those who either refused to or were unable to undergo oral examination were excluded. Ethical approval for the study was obtained from the Institutional Review Board. Informed consent was obtained from all participants. Data collection were carried out in the out-patient dental clinics by two trained and calibrated investigators using plane mouth mirrors, No. 5 explorers and periodontal probes. Calibration trials were performed before the initiation of data collection to ensure intra-and inter-examiner reliability (Cohen's Kappa statistic), which averaged 0.86.
The criteria which were evaluated in the proposed scale were based on the status of the oral tissues in disease and health. Investigators rated the oral status of subjects as follows: Score 0 = if healthy dentition / decayed teeth and cervical abrasions are restored / healthy periodontium / healthy oral mucosa / absence of dental deposits / prosthetic rehabilitation has been done where required and the prosthesis is functional, and patient is satisfied with the prosthesis / no history of tobacco use.
Score 1 = if more than 50% of decayed teeth and cervical abrasions are restored / gingivitis present / presence of dental deposits / prosthetic rehabilitation has been done but the prosthesis is faulty, or patient is dissatisfied with the prosthesis.
Score 2 = if more than 25% but less than 50% of decayed teeth and cervical abrasions are restored / periodontitis present / prosthetic rehabilitation has not been done where required / tobacco use present.
Score 3 = if less than 25% of decayed teeth and cervical abrasions are restored / oro-mucosal lesion present.
The scores obtained were totaled and then rated as Excellent (0-2), Good (3-6), Fair (7-10) and Poor (11-13). Tobacco use present was categorized in Score 2, not in Score 1, to increase weightage to the habit. Construct validity of the scale (Scores 0-3) was done by two experts according to the criteria used.
Statistical Analysis: Subjects were categorized into five age groups: ≤ 15, 16 -30, 31 -45, 46 -60, and ≥ 61 years. Data were analyzed using the Statistical Package for Social Sciences (SPSS) Version 17.0 program for Windows. Differences in proportions were compared using the Chi squared test and a p-value of < 0.05 was considered as statistically significant.

Results
A total of 614 first-visit subjects (43.6% male, 56.4% female) ranging in age between four and 80 years (mean age 36.21 ± 17.12 years), who consented to participate, were examined and interviewed (Table 1). Exclusions numbered 28. year age group, 65% subjects had a high school degree; among the 31-45-, 46-60-and ≥61-year-olds, about 50% subjects had received schooling up to the primary level. There were significant differences between the age groups with regard to education (p < 0.001). Table 2 shows the distribution of subjects based on condition of their dentition. Only 1.6% subjects had an intact dentition. Condition of the dentition differed significantly by gender and age (p < 0.001), and education (p < 0.001). Gingivitis was present in 50.8% study subjects, 31.3% subjects suffered from periodontitis while 17.9% had a healthy periodontium. Table 3 summarizes the periodontal status with respect to gender and age. Educational levels of the subjects' were found to significantly influence their periodontal status (p = 0.002). The labial and buccal mucosae, tongue, floor of the mouth, and soft and hard palates were assessed for presence of oro-mucosal lesions. The prevalence was 7.8%. Among males, prevalence of mucosal lesions was highest in the 46-60-year-olds followed by the ≥61-year-age group while among females, prevalence was highest in the 31-45-year-olds followed by the 46-60-year-age group. Debris was present in 56.8% subjects, calculus in 55.9% subjects and stains in 32.4% subjects. A significant association was found between age and oral hygiene among males (p = 0.008) as well as females (p < 0.001). Presence of dental deposits was significantly related to periodontal status (p < 0.001) and condition of dentition (p < 0.001); however, it was not associated with the educational qualifications of the subjects (p = 0.074).
Of the 614 subjects, 245 (39.9%) had undergone prosthetic rehabilitation (Table 4). Prosthetic rehabilitation was found to be significantly influenced by the gender (p < 0.001) and educational level (p < 0.001) of the subjects. Condition of the prosthesis among subjects who have undergone prosthetic rehabilitation is shown in Table 5. Condition of the prosthesis was significantly associated with education (p < 0.001), and age and gender (p = 0.003 for males and p < 0.001 for females). Among the prosthetically rehabilitated, 76.7% were satisfied with the appliance; however, 20% complained of discomfort and 3.3% of poor retention. Subject opinion when evaluated by education (p < 0.001), and age and gender (p = 0.007 for males and 0.005 for females) showed significant differences.
Tobacco use was reported by 82 subjects (Table 6) and they accounted for 88% of the oro-mucosal lesions observed in this study. These subjects were then referred for further diagnostic tests and treatment. Tobacco use was not linked to education (p = 0.237); however, it was significant vis-à-vis age among female subjects (p = 0.040). When frequency of oral hygiene practice was assessed, 68.2% reported a once daily cleansing ritual, 27.4% brushed their teeth twice daily, 2.1% more than twice daily and 2.3% did not practice any oral hygiene measures. A significant association was found for oral hygiene practices with age and gender [males (p < 0.001) and females (p = 0.016)], education, oral hygiene status and periodontal status (p < 0.001 for all three parameters) and condition of dentition (p = 0.004).
When asked to evaluate their oral status, 0.7% subjects rated their oral health as excellent, 27% as good, 60.2% as satisfactory and 12.1% said their oral health was poor. Significant differences were observed for self-rating by gender, age and educational qualifications (p = 0.015, 0.001 and 0.009, respectively).

Discussion
Studies in recent times (Kumar et al., 2010;Patro et al., 2008;Pekiner et al., 2010;Varenne et al., 2004;Varenne et al., 2005) have attempted to elicit oral status of population groups as an indicator of effectiveness of the oral health care system. As rural populations are denied quality care due to an inequitable distribution of facilities, this investigation evaluated the oral and prosthetic status, tobacco use, and oral hygiene practices of subjects visiting two rural dental clinics which cater to the oral needs of the local population to a large degree.