Increasing supply of dentists induces their geographic diffusion in contrast with physicians in Japan

Quantifying Urban-Rural Inequality in Access to Telemedicine: Descriptive Analysis of Telemedicine Uses and Providers in Japan Under COVID-19

Background: COVID-19 has reportedly resulted in disparities in the use of telemedicine due to several socioeconomic factors. While telemedicine was developed to overcome geographical distance, under COVID-19 telemedicine conversely might have deepened the urban-rural telemedicine divide. Especially in Japan, the authority has virtually regulated distant telemedicine use, which favored telemedicine providers who are located in close proximity to patients. This study aimed to quantify the urban-rural disparity in access to telemedicine and investigate heterogeneity between devices (phone and video visits). Methods: We used two nationally comprehensive data sources in Japan. One was a municipality-level telemedicine provider database. Municipality-provider-level analysis intended to measure the uneven distribution of telemedicine providers compared to usual health care providers as well as the difference among clinical departments. The second source was prefecture-level telemedicine utilization data. Prefecture-utilization-level analysis aimed to quantify how the use of telemedicine converged in urban areas. We investigated the heterogeneity between types of devices and time periods. To measure inequality, this study used the Lorenz Curve and Gini coefficients. Ethical review was not required. Results: The data included 16,927 providers (14,111 clinics and 2,816 hospitals) and 88,952 first visits throughout Japan. The main findings were the geographically converged distribution of telemedicine providers compared with overall providers who were not limited to telemedicine and, possibly as a result of it, the geographically unequal utilization of telemedicine compared with in-person visits. Furthermore, video visits were more unequally utilized than phone visits, let alone in-person visits. The disparity was not resolved over time, which implied a systematic cause. Conclusion: Using comprehensive nationwide data, this study revealed geographical inequality relating to access to telemedicine under the COVID-19 special deregulation in Japan. While telemedicine initially aimed to provide access to care for people in rural areas, several factors, including the digital divide, COVID-19, and the Japanese policy, paradoxically could have caused this disparity.

Gender difference of geographic distribution of physicians in Japan: three-point analysis of 1994, 2004 and 2014

BACKGROUND

Japan's medical education system produces 9,000 graduates annually. Despite the government's implementation of several strategies, including increasing the number of doctors trained, the country still struggles with a shortage of physicians in rural areas. This study examined this issue, focusing on gender and considering years of physician experience, demographic and geographic factors.

METHODS

We analyzed the Physician Census from 1994, 2004, and 2014, examining data on physicians' gender and the number of years since licensure. To correct the impact of municipal mergers, the analysis was aligned with the number of municipalities in 2014 (1741). We examined data from each physician (gender and years of medical experience) and analyzed the demographic and geographic distribution trend using Spearman correlation coefficients. We then used the Gini coefficient to evaluate the distribution change of physicians based on gender and years of experience.

RESULTS

The number of physicians increased 1.29-fold over the 20-year observation period (1.23-fold for male physicians and 2.17-fold for female physicians), and the percentage of female physicians increased from 13.4% to 20.4%. We found that 87.7% of physicians were concentrated in the top 1/3 municipalities in terms of population. The number of female physicians was higher at 91.8% compared to 86.8% for male physicians. The Gini coefficients were lower for veteran physicians of both sexes than for younger physicians. The Gini coefficient for all physicians was 0.315-0.298-0.298 (male physicians: 0.311-0.289-0.283, female physicians: 0.394-0.385-0.395) The Gini coefficients for female compared to male physicians were higher in all age groups, showing that The distribution of female physicians is skewed toward urban areas.

CONCLUSION

Female physicians are less distributed in rural areas than male physicians. In addition, despite the fact that the number of female physicians has increased more than male physicians over the past 20 years, the geographic ubiquity of female physicians has not improved. Since the trend of increasing the number of female physicians is expected to continue in the future, it is necessary to take some measures, such as providing a work-life balance suitable for female physicians.

Characteristics of Hospitals Employing Dentists, and Utilization of Dental Care Services for Hospitalized Patients in Japan: A Nationwide Cross-Sectional Study

Dental care for hospitalized patients can improve nutritional status and feeding function while reducing complications. However, such care in Japan is not uniformly provided. This investigation examined the presence and characteristics of hospitals where dentists work and the collaboration between medical and dental teams. This cross-sectional study involves 7205 hospitals using the administrative reports on the Hospital Bed Function of 2018. Indicators described were the proportion of hospitals employing dentists, those providing perioperative oral care, and those with a nutrition support team (NST) that included dentists. A two-level logistic regression model was performed using hospital-based and secondary medical area-based factors to identify factors associated with hospitals employing dentists and dental care services. Some hospitals had poor medical and dental collaboration, even those with dentists, and no-dentist hospitals had rare medical and dental collaboration. Factors positively associated with hospitals that employed dentists were diagnosis-procedure-combination-hospital types, the Japanese government-established hospitals compared with hospitals established by public organizations, among others. In conclusion, the present study found poor medical and dental collaboration was observed in some hospitals and that hospital type, region, and hospital founders were associated with the performance of collaborative medical and dental care.

Gender Differences in Work Status during Early Career of Dentists: An Analysis of National Survey Cohort Data of 10 Years in Japan

Few studies have evaluated gender differences in young dentists’ career focusing on career breaks and return to work. We created a cohort dataset for dentists registered in 2006 using the national survey between 2006–2016 (men, 1680; women, 984), and examined the work setting of dentists by gender 10 years after registration. The proportion of dentists on career break increased each survey year, and was more pronounced in women than in men (2006 to 2016, men, 11.2% to 14.2%; women, 7.9% to 31.0%). The proportion of those who had career breaks between 2006–2016 was 44.8% in men and 62.9% in women. In the multiple logistic regression for examining the associations between those who returned to work compared to those working continuously, in women, the odds ratios (OR) were significantly higher in those working in dental clinics (owner, OR: 5.39; employee, OR: 3.10), and those working part-time (OR: 2.07); however, in men, there was no significant association with part-time work. These results suggest during early career phase, female dentists are more likely than males to take career breaks and choose part-time on returning. These gender differences should be considered for ensuring adequate workforce in dentistry in the future.

Does postgraduate year training program for dentists worsen the imbalance of geographical distribution of dentists in Taiwan?

Background/purpose

Taiwan implemented the non-compulsory postgraduate year training program for dentists (PGYD) in 2010. Previous studies found that training institutions for dentists are mostly distributed in metropolitan areas. This study explored whether the PGYD system might worsen the imbalance of geographical distribution of dentists in Taiwan.

Materials and methods

This study collected the data of population, the number of practicing dentists from 2010 to 2018, and the number of practicing dentists in the training institutions in 2018 to draw the Lorenz curve and to calculate the Gini coefficient for evaluating whether the PGYD system might worsen the imbalance of geographical distribution of dentists in Taiwan.

Results

Our results showed that the uneven geographical distribution of overall practicing dentists did not deteriorate after the implementation of the PGYD system. However, the uneven geographical distribution of practicing dentists in training institutions was more serious than the uneven geographical distribution of overall practicing dentists.

Conclusion

Because the PGYD system is not mandatory, dentists engage in training program and select training institutions as driven by the market factors. After completion of the PGYD training, dentists choose the practice location as driven by the market factors again and this in turn redistributes the dentists to different regions of Taiwan. In addition, major dentist policies may also result in the movement of dentists to various regions of Taiwan. Thus, the market-driven redistribution of dentists to different regions of Taiwan finally reduces the imbalance of geographical distribution of dentists in Taiwan caused by the PGYD system.

Distribution of dentists in the Greater Tokyo Area, Japan

INTRODUCTION

Japan is considered to have an overabundance of dentists; however, there are scarce data on regional inequalities in the ratio of dentists to patients. We examined these inequalities in Japan's Greater Tokyo Area - otherwise known as the Kanto region, and the world's most populous metropolitan area - by subdividing it into small- and medium-sized medical care zones.

METHODS

We calculated the number of dentists per 100,000 population using the 2012 Survey of Physicians, Dentists, and Pharmacists for the three medical district tiers [primary medical care zones: municipalities (cities, towns, villages and special wards); secondary medical care zones: multiple adjacent municipalities; and tertiary care zones: prefectures]. We also estimated the influence of having a dental school in the district or an adjacent district on the number of dentists.

RESULTS

The number of dentists per 100,000 population was 79.2 across the whole Kanto region; the range for each type of medical care zone was as follows: 65.3-126.4 at the tertiary level; 38.0-929.6 at the secondary level; and 0-3,087.6 at the primary level. The median Gini coefficient among tertiary medical care zones was 0.16 (range 0.11-0.36). The median number of dentists per 100,000 population was 273.8 in primary medical care zones that had a dental school, 79.9 in adjacent zones, and 59.6 in other zones.

CONCLUSIONS

We identified significant inequalities in the number of dentists among the medical care zones, and the presence of a dental school had a major influence on this number.

Interventions for enhancing the distribution of dental professionals: a concise systematic review

BACKGROUND

A spatially unequal distribution of dentists or dental care professionals (D/DCPs), such as therapists or hygienists, could reduce the quality of health services and increase health inequities. This review describes the interventions available to enhance this spatial distribution and systematically assesses their effectiveness.

METHODS

Electronic databases (Cochrane CENTRAL, Medline, Embase, CINAHL) were searched and cross-referencing was performed using a standardised searching algorithm. Randomised and non-randomised controlled trials, controlled before-and-after studies and interrupted time series were included. Studies investigating a minimum of one of four interventions (educational, financial, regulatory and supportive) were included. The primary outcome was the spatial distribution of D/DCPs. Secondary outcomes were access, quality of services and equity or adverse effects. This review was registered (CRD42015026265).

RESULTS

Of 4,885 articles identified, the full text of 201 was assessed and three (all investigating national policy interventions originally not aiming to change the distribution of D/DCPs) were included. In one Japanese study spanning 1980 to 2000, the unequal spatial distribution of dentists decreased alongside a general increase in the number of dentists. It remained unclear if these findings were associated. In a second Japanese study, an increase in the number of dentists was found in combination with a postgraduate training programme implemented in 2006, and this occurred alongside an increasingly unequal distribution of dentists, again without proof of cause and consequence. A third study from Taiwan found the introduction of a national universal-coverage health insurance to equalise the distribution of dentists, with statistical association between this equalisation and the introduction of the insurance.

CONCLUSIONS

The effectiveness of interventions to enhance the spatial distribution of D/DCPs remains unclear.

A synthesis of recent analyses of human resources for health requirements and labour market dynamics in high-income OECD countries

BACKGROUND

Recognition of the importance of effective human resources for health (HRH) planning is evident in efforts by the World Health Organization (WHO) and the Global Health Workforce Alliance (GHWA) to facilitate, with partner organizations, the development of a global HRH strategy for the period 2016-2030. As part of efforts to inform the development of this strategy, the aims of this study, the first of a pair, were (a) to conduct a rapid review of recent analyses of HRH requirements and labour market dynamics in high-income countries who are members of the Organisation for Economic Co-operation and Development (OECD) and (b) to identify a methodology to determine future HRH requirements for these countries.

METHODS

A systematic search of peer-reviewed literature, targeted website searches, and multi-stage reference mining were conducted. To supplement these efforts, an international Advisory Group provided additional potentially relevant documents. All documents were assessed against predefined inclusion criteria and reviewed using a standardized data extraction tool.

RESULTS

In total, 224 documents were included in the review. The HRH supply in the included countries is generally expected to grow, but it is not clear whether that growth will be adequate to meet health care system objectives in the future. Several recurring themes regarding factors of importance in HRH planning were evident across the documents reviewed, such as aging populations and health workforces as well as changes in disease patterns, models of care delivery, scopes of practice, and technologies in health care. However, the most common HRH planning approaches found through the review do not account for most of these factors.

CONCLUSIONS

The current evidence base on HRH labour markets in high-income OECD countries, although large and growing, does not provide a clear picture of the expected future HRH situation in these countries. Rather than HRH planning methods and analyses being guided by explicit HRH policy questions, most of the reviewed studies appeared to derive HRH policy questions based on predetermined planning methods. Informed by the findings of this review, a methodology to estimate future HRH requirements for these countries is described.

Differences in medical schools' regional retention of physicians by school type and year of establishment: effect of new schools built under government policy

Background

Physician maldistribution is an ongoing concern globally. The extent of medical schools retaining graduates within their geographical areas has rarely been explored in Japan or in other countries. This study aimed to investigate whether the proportion of medical school graduates practicing in the vicinity of medical school (retention rate) differs by the year of the school’s establishment and by the school’s funding source.

Methods

This cross-sectional study used a set of databases on medical institutions and personnel. We analyzed a sample of 168,594 clinically active physicians practicing in institutions as of May 2014, who passed the National Medical Practitioners Examination between 1985 and 2013. We assessed the retention rate and the schools’ establishment period and funding source (pre-1970/post-1970, private/public), using a hierarchical regression model with random intercept unique to each medical school. We used the following factors as covariates: gender, physicians’ length of professional experience, and the geographical features of the medical schools.

Results

The retention rate was widely distributed from 16.2 to 81.5 % (median: 48.4 %). Physicians who graduated from post-1970 medical schools were less likely to practice in the prefecture of their medical school location, relative to those who graduated from pre-1970 medical schools (adjusted odds ratio: 0.75; 95 % confidence interval: 0.62–0.90). Physicians who graduated from private medical schools were also less likely to practice in the prefecture of their medical school location, relative to those who graduated from public medical schools (adjusted odds ratio: 0.63; 95 % confidence interval: 0.51–0.77). In addition, the ability to retain graduates varied by school according to the school’s characteristics.

Conclusions

There was a considerable difference between medical schools in retaining graduates locally. The study results may have significant implications for government policy to alleviate maldistribution of physicians in Japan.

Electronic supplementary material

The online version of this article (doi:10.1186/s12913-015-1240-2) contains supplementary material, which is available to authorized users.

Does mandatory postgraduate clinical training worsen geographic distribution of dentists in Japan?

Postgraduate clinical training for dentists has been mandatory in Japan since 2006. Hirata et al. reported that the geographic distribution of postgraduate dental trainees by prefecture in 2006 was worse than that of practicing dentists. This suggests that the postgraduate clinical training system could intensify the problem of distribution of dentists. In this study, therefore, we reviewed the geographic distribution of postgraduate dental trainees and practicing dentists between 2006 and 2010 in detail by city, ward, town and village by using the Lorenz curve and Gini coefficient. The results showed that while there was no significant worsening of geographic distribution of postgraduate dental trainees, the distribution of practicing dentists continued to deteriorate. A number of reasons may explain these findings: the clinical training system is based on a one-year employment contract, and dentists subsequently relocate as driven by the market; and geographic distribution among cities, towns and villages has worsened as a result of the merger of municipalities. The geographic distribution of practicing dentists is expected to deteriorate further if the number of dentists takes a downward turn in the future. Therefore, it is necessary to continuously review the distribution of postgraduate dental trainees.

Geographic Distribution of Radiologists and Utilization of Teleradiology in Japan: A Longitudinal Analysis Based on National Census Data

BACKGROUND

Japan has the most CT and MRI scanners per unit population in the world, and as these technologies spread, their geographic distribution is becoming equalized. In contrast, the number of radiologists per unit population in Japan is the lowest among OECD countries and their geographic distribution is unknown. Likewise, little is known about the use of teleradiology, which can compensate for the uneven distribution of radiologists.

METHODS

Based on the Survey of Physicians, Dentists and Pharmacists and the Static Survey of Medical Institutions by the Ministry of Health, Labour and Welfare, a dataset of radiologists and CT and MRI utilizations in each of Japan's 1811 municipalities was created. The inter-municipality equity of the number of radiologists was evaluated using Gini coefficient. Logistic regression analysis, based on Static Survey data, was performed to evaluate the association between hospital location and teleradiology use.

RESULTS

Between 2006 and 2012 the number of radiologists increased by 21.7%, but the Gini coefficient remained unchanged. The number of radiologists per 1,000 CT (MRI) utilizations decreased by 17.9% (1.0%); the number was highest in metropolis and lowest in town/village and the disparity has widened from 1.9 to 2.2 (1.6 to 2.0) times. The number of hospitals and clinics using teleradiology has increased (by 69.6% and 18.1%, respectively). Hospitals located in towns/villages (odds ratio 1.61; 95% confidence interval 1.26-2.07) were more likely to use teleradiology than those in metropolises.

CONCLUSIONS

Contrary to the CT and MRI distributions, radiologist distribution has not been evened out by the increase in their number; in other words, the distribution of radiologists was not affected by market-derived spatial competition force. As a consequence, the gap of the radiologist shortage between urban and rural areas is increasing. Teleradiology, which is one way to ameliorate this gap, should be encouraged.

Income-related inequalities in preventive and curative dental care use among working-age Japanese adults in urban areas: a cross-sectional study

Background

Preventive dental care use remains relatively low in Japan, especially among working-age adults. Universal health insurance in Japan covers curative dental care with an out-of-pocket payment limit, though its coverage of preventive dental care is limited. The aim of this study was to test the hypothesis that income inequality in dental care use is found in preventive, but not curative dental care among working-age Japanese adults.

Methods

A cross-sectional survey was conducted using a computer-assisted, self-administered format for community residents aged 25–50 years. In all, 4357 residents agreed to participate and complete the questionnaire (valid response rate: 31.3%). Preventive dental care use was measured according to whether the participant had visited a dentist or a dental hygienist during the past year for dental scaling or fluoride or orthodontic treatments. Curative dental care use was assessed by dental visits for other reasons. The main explanatory variable was equivalent household income. Logistic regression analyses with linear trend tests were conducted to determine whether there were significant income-related gradients with curative or preventive dental care use.

Results

Among the respondents, 40.0% of men and 41.5% of women had used curative dental care in the past year; 24.1% of men and 34.1% of women had used preventive care. We found no significant income-related gradients of curative dental care among either men or women (p = 0.234 and p = 0.270, respectively). Significant income-related gradients of preventive care were observed among both men and women (p < 0.001 and p = 0.003, respectively). Among women, however, income-related differences were no longer significant (p = 0.126) after adjusting for education and other covariates. Compared with men with the lowest income, the highest-income group had a 1.79-fold significantly higher probability for using preventive dental care.

Conclusions

The prevalence of preventive dental care use was lower than that of curative care. The results showed income-related inequality in preventive dental care use among men, though there were no significant income-related gradients of curative dental care use among either men or women. Educational attainment had a positive association with preventive dental care use only among women.

Association between perception of dentist oversupply and expectations of dentistry: a survey of dental graduates in Japan

BACKGROUND

The perception that there is a surplus of dentists may be an opportunity to explore attractive career options in dentistry in Japan.

METHODS

A self-administered questionnaire was mailed to 2,114 graduates of a private dental school in Japan. We asked about the perception of oversupply, rated by a visual analogue scale, work environment factors, potential areas of dentistry and necessary medical subjects for their dental practice. The association of a strong perception of dentist oversupply with work environment factors, dental areas and medical subjects was examined by multivariate logistic regression analyses.

RESULTS

The response rate was 66%, and data from 1,203 community dentists were analysed. Most respondents (76%) perceived either a strong or very strong surplus of dentists. A very strong perception was significantly associated with work environment factors, including practising in large cities and earning the second lowest of four levels of annual income, but no further associations were found with either the number of patients treated or with the other two ranges of income. This perception was negatively associated with the number of necessary medical subjects, specifically otorhinolaryngology, but no significant association was seen with the number of potential areas of dentistry.

CONCLUSIONS

The negative correlation between the aspiration to acquire medical knowledge and the perception of dentist oversupply under the circumstance of the possibly excessive perception among community dentists invites further research on the benefits of teaching oral medicine to graduate entry students to build future working satisfaction.

Redistributive effects of the National Health Insurance on physicians in Taiwan: a natural experiment time series study

BACKGROUND

Previous studies have evaluated the effects of various health manpower policies but did not include full consideration of the effect of universal health insurance on physician re-distribution. This study examines the effects of implementing National Health Insurance (NHI) on the problem of geographic mal-distribution of health providers in Taiwan.

METHODS

Data on health providers and population between 1971 and 2001 are obtained from relevant governmental publications in Taiwan. Gini coefficients derived from the Lorenz curve are used under a spline regression model to examine the impact of the NHI on the geographic distribution of health providers.

RESULTS

The geographic distribution equality of the three key health providers has improved significantly after the implementation of NHI program. After accounting for the influences of other confounding factors, Gini coefficients of the three key providers have a net reduction of 1.248% for dentists, 0.365% for western medicine physicians, and 0.311% for Chinese medicine physicians. Overall, the absolute values of the three key providers' Gini coefficients also become close to one another.

CONCLUSIONS

This study found that NHI's offering universal health coverage to all citizens and with proper financial incentives have resulted in more equal geographic distributions among the key health care providers in Taiwan.