Contribution of primary health care teams to equity in universal access to health services

Since Alma Ata Declaration, 40 years ago, the Health Service Systems has undergone signifi cant changes, but those achievements are unevenly distributed, with an increasing number of people without coverage by basic health services. Advances in technology, including the arrival of big data, together with the adoption of evidence-based care models have been transformative, especially for primary health care [1].


Introduction
Since Alma Ata Declaration, 40 years ago, the Health Service Systems has undergone signifi cant changes, but those achievements are unevenly distributed, with an increasing number of people without coverage by basic health services.
Advances in technology, including the arrival of big data, together with the adoption of evidence-based care models have been transformative, especially for primary health care [1].
The strengthening of Primary Health Care (PHC) has been proposed as the best instrument to achieve more effi cient and equitable health systems. When comparing several countries with the same degree of economic development, for the same investment, those who have organized health care around the postulates of primary health care enjoy a higher level of health [2].
Recently, an international meeting on PHC promoted by WHO was held in Astana, Kazakstan. At this meeting, it was concluded that modern PHC should be supported by societies that prioritize and protect people, families, and communitie's health, provides affordable and safe health care for everyone, everywhere; treat people with respect, dignity, and health offi cials committed to the promotion and maintenance of health [3].
Currently, many countries are committed to the continuous improvement of their population's health and are experiencing changes: an accelerated demographic transition; a permanent change in the patient's expectations; and budget constraints, that demand improving the way health care is organized and provided. Therefore, to achieve universal access, and improve population health, it is necessary to implement PHC through the interaction of its key factors as community participation, family health care, health promotion, and research [4,5].
For this reason, putting primary health care at the center of the health system reform is a political objective shared by almost all countries, in order to respond more effi ciently and equitably to the changing needs and expectations of the population as well as the rising costs in medical care [6].
However, health care seek patterns differ within human groups and social territories depending largely on how the supplied health services is utilized by individuals and families; they must be taught how to navigate the health system. Gaps in universal access to health care may be exacerbated by this situation, making it diffi cult to accomplish the mission of reducing health inequalities.
There are considerable inequities in access to health services, which are more marked among the human groups with greater social vulnerability. These disparities partly refl ect the differences in access to the social determinants of health in living conditions and in the health-related behaviors of different populations. People living in economically depressed areas used to have lower levels of education; higher rates of unemployment; lower income than people from more developed areas; a higher proportion of long-term disabling diseases; as well as poorer health [7].
In some countries, there have been reports of the alarming negative experiences of patients, with permanent diffi culty for contacting the health care system, with a consequent search for care at higher levels of complexity, which produces an increase in the cost of medical attention [8].
Children constitute an important and vulnerable social group from the perspective of public health, since they constitute the future of society; and so, achieving their optimal health and quality of life is essential. Within and outside territorial entities there are different patterns in the provision of health services for children, due to a broad division between generalist and specialized models. Children who live in disadvantaged areas often resolve their health problems through emergency rooms, usually when the course of their illness is very advanced [9].
To break this negative circuit, the practice of primary care must fi nd a way to develop mechanisms that allow the health offer to execute and maintain the balance between the main components of the strategy: becoming the fi rst point of contact with the network of services; and providing comprehensive, coordinated, and continuous care throughout the life course [10].
A similar situation is reported in the municipality of Santiago de Cali, for that reason in 2001 started the Family and Community Health Strategy (ESFC), implemented to overcome some barriers, which impeded access to health care services. The purpose is to bring the public healthcare services closer to families living in conditions of high vulnerability in commune 20, characterized by poor living conditions along with poverty [11,12].
Primary care plays an important role in early detection and treatment for people who have an undetected disease or are at risk of developing it. The objective of this study was to estimate the contribution of the extra mural PHC team towards equity, concerning access to basic health care service, through the early detection and referral of new cases to the health center, in the public network of ESE Ladera in the municipality of Santiago de Cali, in Colombia.

Methodology
The Ladera Public Health Network covers the geographical area where the Family and Community Health (SFC) strategy was implemented, The territory is composed by of six communes located in the western zone of the city of Cali (Communes 1, 3, 17, 18, 19 and 20), 90% of the population living in this area is classifi ed as stratum 1 and 2, the poorest. A large part of living in diffi cult social and economic conditions, which puts them in a high social and economic vulnerability.
Cali is the third largest city of Colombia, located in the tropical zone, near to the equator line, therefore, it has no marked seasons, and there are only two: the rainy season and the dry season. All the families in the studio were exposed to fl uoride in the water, just like the rest of the city's population. Except for this population intervention, these families did not receive any other preventive actions.
A multilevel study was carried out to evaluate the contribution of the four primary health care teams (PHC), covered 1000 families in the poor area selected. These families represent 15% of the families that reside in the prioritized area. The comparative advantage of this procedure is that both measures can be used when you want to evaluate the goodness of fi t whether the model is nested, or not. In both measures, the lowest values indicate the best fi t of the model [13]. 10% was used as a level of signifi cance (alpha), in order to increase the power (probability) of the study to detect associations if this exist [14].

Results
The PHC team presence, at the homes, accounted for 54.4% of the dental cavities cases referred to the health center. Other factors involved were child's age 30.05%; overcrowding in the home 1.2%; use of tobacco by one of the parents 0.5%; and the presence of good ventilation 0.5%. The goodness of fi t of the adjustment of the model was -2lo likelihood = 59.8, CIA = 71.8 and CIB = 59.8 ( Table 1).
The PHC team, at the homes, accounted for 58.5% of the acute respiratory infection cases referred to the health center. Other factors were child's age 19.2%; presence of a system of excreta in the house 1.7%; material of the fl oor 10.3%; and subsidized health insurance 10.1%. The goodness of fi t of the adjustment of the model was -2lo likelihood = 108.1, CIA = 120.1 and CIB = 59.8 9 ( Table 2).
The PHC team, at the homes, accounted for 52.8% of the Acute Diarrheal Diseases cases referred to the health center.
Other factors involved were the presence of pets at home 1.1%, and overcrowding in the house 1.5%. The goodness of fi t of the model was -2lo likelihood =36.6, CIA =46.6 and CIB =36.6 ( Table 3).

Discussion
According to these fi ndings, 54.4% dental cavities, 58.5% acute respiratory infections, and 52.8%, acute diarrheal disease, were cases known and referred by the PHC team's presence in the area.
In other words, did not go to those homes, approximately half of those cases would not have been referred in time. Accordingly, the children with dental cavities may have never received dental care, because there are no mobile dental units in that area.
In the fi rst level of analysis, in relation to the search for care of dental cavities, child age was the most important variable of the fi rst level, which accounted for 30.05%. Overcrowding at home, tobacco consumption, and poorhouse ventilation contributed with 1.2%, 0.5%, and 0.5%, respectively.
Concerning the search for ARI care, child age accounted for 19.2%, the presence of a system of excreta at home 1.7%, the dwellings with a dirt fl oor 10.3%, and subsidized health insurance 10.1%. The aforementioned results were the most important at fi rst level.
Concerning the ACD, the presence of animals at home accounted for 1.1% and overcrowding made a signifi cant contribution but of little importance, just 1.5%. Overcrowding is a variable of confusion; therefore, it remained in the model.
It was not possible to fi nd, in the scientifi c literature reviewed, a study aimed to estimating the contribution attributable to the PHC team, since most of the studies reviewed pointed to evaluating the participation of the family physician, and this type of professional is not included in the APS team in Colombia. We, nevertheless, found some experiences that evaluated the participation of the professional and technical nursing staff within the PHC team [15,16].
Nursing interventions seem to be very cost-effective for improving health outcomes in PHC. Additional studies are required to evaluate their performance in several factors, such as, the development of intersectoral coordination; community leadership; health research; and in ethical skills for decision making in primary care services [17,18].
In Sweden, a study assessed to evaluate the impact of the application of health promotion resources to the most disadvantaged groups of society. The study aimed to capacitate people who do not seek care despite the need and to increase awareness about how their lifestyle affects personal health.
The key results were the reduction in time to achieve medical attention, facilitating access to care, and increase coverage. The researchers noted a decrease in exclusion and an increase in family social participation in health issues [19]. This study yielded results similar to ours.
In Finland, a study reported that 20% of PHC visits were related to undetected acute respiratory infection [20], in our    [21].
In progressively fewer problems in accessing basic health services [22].

Conclusions and Recommandations
The magnitude of the contribution from the PHC team found in this study, justifi es its presence in the most vulnerable areas.
These fi ndings reinforce the principle established by the APS in the sense of being a strategy with positive discrimination; that is, it contributes to social and health equity due to its special emphasis on the attention of those population groups, who are not regularly attended by health institutions.
It is an ethical imperative, in the interests of health equity, to implement strategies that provide basic health services beyond the walls of the health institutions since, for various reasons, there are groups of families that do not have easy access to intramural services. The situation deepens inequalities in health, contributing to increase the condition of vulnerability as well as poor health of these families and communities, as a whole.
These fi ndings indicate, that extramural health care provides a unique opportunity to develop community-based health promotion interventions, and provides an organized institutional response to those out to reach.
Although it is recognized that strengthening of PHC services is a political priority, and an ethical imperative, to achieve greater equity in health, its implementation is a challenge in a system dominated by a health system, which is focused on the disease treatment.