Behavioral factors associated with utilization of outpatient services among elderly in Pakistan: evidence from a nationally representative survey

Background In Pakistan, health system is facing unprecedented challenges to deal with the healthcare demand of the growing ageing population. Using conceptual framework, this study analyzes the factors associated with outpatient services utilization by the elderly population Methods This study used a sample of 5,319 individuals aged 60 and above extracted from the Pakistan Social and Living Standards Measurement Survey 2014-15. We modi�ed the Anderson’s Behavioral model to accommodate available information on the elderly healthcare utilization. The behavioral factors, including predisposing, enabling and need factors, associated with the use of outpatient service were analyzed using exploratory data analysis and binary logistic regressions. The utilization of outpatient service in the study refers to the visits to private and government hospitals. Results


Background
The demographic shifts in developing countries, such as increase in life expectancy and decline in fertility rate, have contributed to the growth of elderly populations [1].The number of people aged 60 years and above is expected to rise by 56% from 901 million in 2015 to 1.4 billion in 2030.The estimated increase in the elderly population is much higher in developing countries than in developed nations [2].Among others, aging is a single most risk factors that stands out the most in the etiology of disease causation, aggravated by the accumulation of cell damage, compromised immune response and subsequent in rmity to repair cells, and developing a host of different diseases [3,4].Several studies have reported that the elderly tend to have several comorbidities [5], chronic health conditions [6], and dependency on multi drugs [7].These factors contributed to the increased rates of hospital admission and outpatient services utilization by the elders [8].
Taking care of elderly health is a serious undertaking for a responsive health system.The economic impact on elders, responsiveness of health emergencies, and the positive health outcomes are the key components that need to be taken care while dealing with the healthcare of elderly.
Private healthcare has emerged as a leading healthcare provider in many low-middle income countries (LMICs) catering healthcare needs of populations [9].
Pakistan is one of the ve largest countries in Asia, with a population of 207.7 million.The current population growth rate of 2.4 is higher than all other neighboring countries.By the year 2050, there will be an estimated 26 million people aged 65 years in Pakistan [9].With an increase in the life expectancy and population growth rate, the percentage of elderly in Pakistan has been growing, resulting in the escalation of dependency ratio in the country.The current dependency ratio of more than 65% is placing a considerable burden on the healthcare system and demand for healthcare and medications.
Pakistan's healthcare system consists of a mix of public and private healthcare facilities.The services in the public health delivery system range from Basic Health Units (BHU) to tertiary referral centers.The BHU and Rural Health units are the two components of Primary Health Care (PHC) catering health services to the rural population.However, nearly 70% of the population relies on private health facilities, and merely 30% of the population utilize health services in the public healthcare sectors [10].The community-level health services led by the Lady Health Workers (LHWs), Lady Health Visitors (LHVs), and Community Midwives (CMWs) are recognized as the most successful outreach primary healthcare services in Pakistan [11].However, these Community-led health services are meant for meeting the reproductive needs of adolescent women in Pakistan.
Andersen and J.R Newman proposed a comprehensive framework of the behavioral model for identifying factors of healthcare utilization.This model emphasized that health services utilization is determined by; individual's predisposition to use services (predisposing factors), factors supporting or hindering service utilization (enabling factors), and patient's illness level (need factors) [1].The use of outpatient healthcare services among the elderly depends on a range of factors such as socio-demographic, cultural, nancing, the availability of regional resources, etc. [12].
The existing literature identi ed several factors as the potential barriers for the under-utilization of public healthcare service in Pakistan, including lack of quali ed health professionals, poor quality of services, high rates of absenteeism, and inconvenient location of PHC facilities [13].The responsiveness of public healthcare facilities to elderly healthcare needs remains lower compared to private facilities in Pakistan [13].

Nonetheless, the paucity of studies on the distribution of utilization of public and private healthcare by the elderly indicates a gap in research in
Pakistan.There is no clear evidence examining the determinants of the use of outpatient service by the older population in Pakistan.The present study lls the gap by using a modi ed Anderson's Behavioral model [14], which is considered a pioneering model to understand healthcare utilization behavior in the developing countries, to highlight the utilization of outpatient services and its distribution between public and private facilities in Pakistan for the older population.The ndings can provide credible evidence to meet the challenges of increasing healthcare needs of an aging population, particularly issues related to socioeconomic and regional disparities in the use of more affordable healthcare services, bifurcation of healthcare as per age of the older persons, and lack of family support for elders living without a spouse/partner in Pakistan and similar settings.

Analytical Framework
This paper modi ed the conceptual framework proposed by Ronald.M. Anderson [14] to analyze the healthcare service access and utilization.According to this model, the population healthcare utilization behavior is determined by three factors: predisposing, enabling, and need.These factors can in uence the healthcare utilization at both the individual and contextual level.The predisposing factors include demographic and socioeconomic characteristics of the individual, i.e., gender, age, marital status, place of residence, employment status, social class, attitude, and knowledge of healthcare services.The enabling factors comprise resources that directly or indirectly affect the ability to afford the healthcare services, for example, wealth or income, social security, health insurance etc.The need factors refer to the need to be perceived by ailing person or need to be gauged by a health professional.This study has some data-related limitations; for example, the data is not available on social class, attitudes and knowledge of the elderly, and types of ailment and treatment sought.Therefore, our modi ed model includes selected predisposing and enabling factors for which the information was available.Further, the dataset did not provide information on the types of ailment, treatment, expenses on medication, and duration of the stay in hospitalization.We used the frequency of the consultation as the proxy for the severity of the need or illness.The following is the analytical framework used in the study (Figure 1).Several previous studies have modi ed the framework in the respective contexts to explain the healthcare utilization behavior of the population [14][15][16][17][18][19][20].

Data Sources
This study used data from Pakistan Social and Living Standards Measurement (PSLM) Survey (2014-15), the largest administrative dataset sponsored by Pakistan Bureau of Statistics (PBS).The purpose of this survey was to collect information on health, education, assets, and economic condition of households, water, and sanitation, and the satisfaction of households by facilities and services used.PBS has developed its sampling frame for both urban and rural domains segregating each city/town into enumeration blocks, and each block consisted 200 to 250 households with speci c boundaries and maps.
Given the survey's objectives, the sample size for the four provinces has been xed at 5,428 sample blocks comprising 81,992 households.This study limits elderly participants from 60 years and above.Given this limitation, a total of 5,319 participants were identi ed and examined for their healthcare needs.The data of behavioral factors, such as age, gender, marital status, region, province, education, wealth status, frequency of consultation and pension, of healthcare utilization was considered for empirical analyses.

Outpatient Services
The study used information on the utilization of outpatient services collected from individuals aged 60 years and above.The information was available on whether the interviewed person fell sick in the past two weeks or not, and in case he or she fell sick, did she consult private or government or other healthcare provider for consultation.The "other consultation" included less than three percent of the weighted overall responses.We combined "other consultation" with the government.Outpatient services utilization was a binary variable, whereas 1 refers to visited/consulted government or private healthcare services; 0 signi es did not visit/consulted.

Behavioral factors
The predisposing factors included gender, region, age groups, province, and marital status.The gender was measured as a categorical variable; male, and female.The region was a categorical variable coded as rural and urban; age groups were categorized in years-group 60-69, 70-79, 80 and above; the province was classi ed as Punjab, Sindh, Khyber Pakhtunkhwa or KPK, and Balochistan.Marital status comprised two groups, married, and unmarried/widower or widow/ divorced.The enabling factors were wealth status, pension and attended school.A better wealth status and availability of social security after retirement enhances the ability of the elderly to use healthcare services, and education helps to gain knowledge about the availability and quality of health care services.The different quintiles of the wealth status, a composite index of household asset, was assigned codes in ascending order, poorest, poor, middle, rich, richest.The availability of social security or pension after retirement was categorized as ye and no.Attended school was measured as a binary variable; attended; not-attended Moreover, frequency of consultation was used as the need factor, and it was measured by asking the interviewee that how frequently he or she visited the hospital in the last two weeks' prior the survey, the answers were recorded, as follows; only once, two-times, three times, and so on.We grouped all responses into three categories; once; two-times, three times and more.

Binary logistic regression
As the dependent variable, the use of private or public hospital services, is dichotomized or (0/1).The study used a binary logistic regression model which is the most appropriate method to examine the predicting factors of outpatient services among the elderly.The predicted value is described using odd ratios (estimated by taking the antilog of the logistic coe cient) [21].It is pertinent to mention that the logistic model has some advantages over the simple linear probability model.The linear model states that probability is a linear function of the regressors, whereas the binary logistic model asserts that the natural log of the odds is a linear function of regressors.Unlike, the simple linear regression, a binary logistic regression can handle independent variables of any data level (binary, categorical, or ordinal).The only problem is that the results of the binary logistic model are harder to interpret.However, the logistic model is preferred to examine a series of independent variables that can best predict the outcome [22]

Results
The univariate analyses in Table 1 include the distribution of general characteristics of 5,319 study participants disaggregated by the health facility type.Majority of participants (72.4%) visited outpatient services in private hospitals and the remaining visited public hospitals.Out of the total, the highest proportion (54.4%) belonged to the 60-69 age-group and 51.3% were females followed by subsequent older age-groups and males, respectively.A higher percentage of participants from the rural (63.1%) and from Punjab province (50.9%) visited outpatient services, while the utilization of outpatient visit was rather low among urban and Balochistan from participants.P-value was calculated at three signi cance levels, **p < 0.1, ***p < 0.01, and *p < 0.05 Among total participants, 76% did not attend school, and 46% were married.Overall, 92.5% did not have pension and a wide gap in wealth status among the poorest and richest quintiles was observed among participants.One-tenths (10.5%) of participants were from the poorest wealth quintile whereas 36.3% belonged to the richest wealth quintile.The majority (42.4%) of participants had visited outpatient service one time, and 40.20% had visited for two times in the last two weeks.It is worthwhile to note that, a higher percentage of participants visiting private hospitals were from the wealthier quintiles, whereas, lower percentage of richer participants visited government hospitals.A similar trend was observed in the case of region of residence and outpatient seeking behavior.A higher percentage of participants from the urban region visited private hospitals for outpatient services (Figs. 2 and 3).
The results from binary logistic regressions of the determinants of utilization of healthcare services by the elderly were presented in Table 2 Participants who attended school (AOR: 1.21, CI 0.82-1.31)were more likely to utilize outpatient service in private hospitals, while participants who did not attend school were 18% less likely to visit government hospitals.Similarly, those participants belonging to the rich (AOR: 1.04, CI 0.84-1.13)and richest (AOR: 1.29, CI 0.89-1.87)wealth quintiles were more likely to visit private hospitals.Surprisingly, similar gures were observed in the utilization of outpatient services in government hospitals by the participants of rich and richest households.However, the strength of association was higher among the richest quintile participants and utilization of outpatient services in private hospitals.Higher consultation frequency was associated with a higher likelihood of visits to outpatient services in both private and government hospitals.As the frequency of consultation increases, the likelihood of utilizing outpatient service in private was increased by 17%, while the likelihood of visiting government hospitals was as high as 5%.

Discussion
The aim of this study is to assess the factors determining the utilization of outpatient services by the elderly population in public and private hospitals in Pakistan.For this, we used Andersen's conceptual framework of healthcare utilization to categorize study variables into predisposing, enabling, and need factors.Some obvious ndings such as age-group of participants, place of residence, and province were signi cantly associated with the utilization of outpatient services.However, no signi cant association was observed in the case of gender and outpatient care-seeking behaviors.Enabling factors like school attendance economic status of participants, and the frequency of consultation under need factor, were more associated with outpatient treatment-seeking behavior in private hospitals.
Our nding showed that the utilization of outpatient service in private hospitals was higher.Though the healthcare services in the government-owned facilities in Pakistan is offered at very minimal cost, several underlying factors such as substandard infrastructures, limited specialized health professionals, long waiting time in the public health facilities stymied the utilization of healthcare services in public health facilities [11].Healthcare services in many resource-poor settings in low-and middle-income countries face similar constraints.The healthcare delivery system in South Africa where 30% of people choose to pay out of their own pocket to attend private sector facilities even though the public sector primary care is free [23].
A wide disparity exists in spending on the health sector across several provinces in Pakistan.The health care delivery in Pakistan is considered as a neglected sphere of social security.A report indicated that the government allocation in health care is as low as 0.4% of its overall GDP, thereby nearly 78% of the population pays out of their pockets for health services in private health sectors [24].Adequate spending on public healthcare by the government ensures a robust functioning of healthcare delivery in the country.The emerging demand for the health needs of the dependent population is ever increasing in Pakistan.Health equipment and skilled health workers are the backbone of the health system and the allocation of dedicated budget to procure and upgrade health technology could meet the demand of healthcare needs of the country.
Due to the psychological need and low-immune system, more elderly population than other age-groups, utilize health services.A study from the European countries reported that a higher proportion of older age-group tend to have multiple morbidities and tend to visit hospitals more often [25].
Our study showed that older age-group (80 years and above vs.60-69 years) were signi cantly more likely to visit private outpatient care for consultation.Our study ndings are consistent with other studies depicting a positive association between healthcare utilization by older populations [26].As opposed to our nding, a study conducted in Hongkong where the healthcare delivery is much e cient, indicated that poor elders visited governmental facilities than private service providers [27].This provides a clear notion that the availability of an e cient healthcare system is key to the utilization of services in the facility.Our study nding did not show a signi cant result on the gender-wise differences in the utilization of healthcare services.The treatment-seeking behaviors are widely dependent upon the physical and psychological characteristics of an individual nor it is a gender-speci c.Nevertheless, a study conducted in China reported that women tend to use more outpatient services than men due to the physical and psychological needs of women [28].
Outpatient service utilization varied across different geographic regions in Pakistan.Participates from Punjab province were more likely to seek outpatient care services in private hospitals.Similarly, participants from the urban were more likely to visit private hospitals for outpatient services.In other words, participants from urban were less likely to visit government hospitals.Usually, private health facilities are urban-centered and are established for pro t motives.The low coverage of private healthcare services in rural areas could be one of the prominent factors for the lower utilization of private healthcare services by rural population.On the other hand, residents from urban areas have easy access to both public and private health services.Inconsistent results were found in earlier studies signifying a varied nding on the health-seeking pattern by rural or urban residents.Our study nding is comparable with the study from China that showed the utilization of healthcare services was higher among rural population than urban residents [29].
In Pakistan, a higher proportion of residents in both rural and urban consult private health care providers; private hospitals, clinics, and chemist [13].
A study from Pakistan highlighted that the inaccessibility of public health services and limited operation hours in rural parts of the country are the major factors that explain the underutilization of healthcare services in rural areas.The unavailability of health workers at the health facilities makes it more di cult to receive health services in public health facilities [11,30].A study also revealed that traditional health providers -tabbibs are more common in rural areas where the presence of both private and public healthcare is sparse [13].
The geographical inequalities in the distribution of healthcare facilities, skilled health manpower, between provinces, districts and rural-urban areas are widespread in the country [31].The national health policy 2001 of Pakistan envisioned to address urban bias in the health sector by extending public healthcare services in rural areas but the situation has not changed despite a long transition [32].The allocation of healthcare resources in rural areas ought to be prioritize based on the healthcare needs of elderly to balance the unequal distribution of health service in the rural areas.
Among enabling factors, participants who attended school and from richer households were more likely to visit private hospitals for outpatient services.A higher level of education and better economic status are interrelated to each other and can be taken as a proxy measure of affordability as chances are high that educated individuals get a job that pays well which enables them to pay healthcare costs in private hospitals.A study also reported that not having education was associated with higher utilization of healthcare at PHC [26], while another study revealed that some level of education was associated with utilization of health services in private facilities [33].
Low income has been identi ed as a major risk for illness and death in older people [5,6].Wealth is a signi cant enabling factor that determines the affordability and utilization of health care in good health care providers.At the same time, there is an obvious association between nancial empowerment and health and well-being.Several studies from LMICs reported an association between economic status and distribution of healthcare utilization [28,34].Our study result showed that richer elders were more likely to visit private hospitals than the poor.This depicts a true picture of inequality in healthcare utilization by rich and poor population in Pakistan.Various studies have reported that factors associated with the utilization of healthcare service are largely dependent upon the various aspects of quality of care including privacy [35,36], the readiness of services and long waiting hours [36], and quality of diagnosis, counselling and prescribing medications [37].Public perception of lower quality and longer waiting time in public hospitals play an important role in determining factors for the use of type of health care.Despite increasing trust on private healthcare providers in developing countries, a study contested that the quality of care at the private facility was found to be dismal [38].As stated in the study, heavy reliance on less quali ed or unskilled health workers in private facilities, poor people spend a greater proportion of their income on healthcare than the rich [39].An opposing nding was reported by a study conducted in Ghana showing a positive association between wealth and the use of private facilities [33].A study conducted in Hong Kong also reported that poor elders were more likely to utilize public facilities and fewer private service providers [27].
We included frequency of consultation as a proxy of need factor since the higher number of consultations implies serious illness that requires urgent attention.Our study reported that higher number of consultations was linked with the utilization of health service in private facilities.Due to the high healthcare costs incurred in private health institutions, some elders requiring higher number consultations could also continue to seek healthcare services in private sectors.Usually, health care needs of elderly are too complicated with multiple morbidities that require a frequent visits to health facilities [5].Hence, social security packages for elders such as subsidies in healthcare packages or health insurances to cover the nancial burden of elderly health would be bene cial to ease healthcare services.
The study is not without limitations.Cross-sectional nature of this did not allow us to determine cause and effect relationship between factors associated with the utilization of types of healthcare providers.Prospective studies are thus recommended to understand the actual factors that might in uence elderly health.Due to nancial constraints, this study did not capture some of the important factors in uencing the utilization of health care by elders such as having health insurance, health conditions, work status, this has restricted us to study the comprehensive factors affecting healthcare-seeking behaviors of elderly.Most important of all constraints is the unavailability of data on healthcare needs of the population, especially the data on types of ailment, treatments, expenses on medication and hospitalization, healthcare insurance, duration of the hospitalization, availability of subsidized or free medicine for the poor, and services offered by the government hospital upon hospitalization, and community level care giving services for the older persons.

Conclusions
Our study concluded that factors such as participants belonging to the older age-group, from rural, having poor economic status, and no schooling were signi cantly associated with the utilization of private outpatient service by the elder population.These ndings are suggestive that public healthcare facilities need to be better upgraded to treat the ailments of elderly by addressing the urban-rural imbalance in the healthcare delivery system in Pakistan.Expansion of government healthcare services in rural areas can be done through the establishment of dedicated health units to serve the elderly population in rural areas.Such establishments can be used as a referral point to the higher-level health facilities and address the inequitable distribution of public facilities.Poor elders are more at risk of having multiple morbidities and are usually unable to pay for the consultation fee for the service in private health facilities.Implementation of social welfare bene ts can be helpful for those who are excluded from accessing healthcare due to nancial constraints.The utilization of outpatient services among elderly associated with their wealth status in Pakistan Source PSLM 2014-15

Table 1
Univariate analysis of the behavioral factors of the use of outpatient services among the elderly in Pakistan (N = 5,319) P-value was calculated at three signi cance levels, **p < 0.1, ***p < 0.01, and *p < 0.05

Table 2 :
Results of Binary Logistic regressions of the utilization of private and government healthcare services among elderly in Pakistan *p<0.05, **p<0.10,***p<0.001;AOR means Adjusted Odd Ratios; Ref. implies reference category