Survival Factors of Motorcycle Ambulances Made in Bobo- Dioulasso, Burkina Faso, West Africa
M. Schlumberger1, M. Kone2, E. Betsem3, A. Saignol4, I. Sombie5, J. Testa6, C. Sanou7, O. Dufriche8, B. Eichwald9, Y. Savadogo10
Copyright : © 2016 Schlumberger M. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
1.Introduction
In 1992, in the context of “Poor Countries Debt Relief Program” (PCDRP) [5], Switzerland gave BS funds to produce 250 MA, built from a motorcycle Jianshe© from Popular China at a unitary cost of 2,500 US$ (2004) (figure 2).
In 2005, Jean-François Bakyono made a survey on 45 MA of Région des Hauts-Bassins or “High Valleys Region” (HVR) around Bobo-Dioulasso [6] (table 1). Health Centers (HC) were in charge of MA, most of the time with financial control by a local “Management Committee” (MC), asking, for transfer of patients, a contribution, on average, of 5 US$, against 30 US$ with Four-Wheel Drive (FWD) ambulance-cars.
Along Burkina Faso, many African countries, in small scale, imported or developed MA: Mali [7, 8], Sierra Leone [9], Guinea-Bissau [10], Uganda [11], South-Sudan [12], South-Africa which inspired many countries [13], Chad [14], Guinea-Conakry [15], Senegal [16], Niger [17], and Democratic Republic of Congo [18]. Hoffman in Malawi has shown also the benefits of MA in obstetrical urgencies [19]. However all those African countries have small number of MA, conducting to descriptive publications. Only Burkina Faso has produced MA at big scale and locally, giving opportunity to conduct analytical studies.
2. 2. Aim of The Study
3. Equipment and Methods
In 2014, from the 66 MA produced by BS in Bobo-Dioulasso and assigned to HC at random in HVR, 63 MA were investigated [20]. Three MA were not investigated for security reasons, located in HVR at the border of Mali-Burkina Faso.
Between February and June 2014, all documents concerning MA in HVR were analyzed: HC and MD medical reports of urgency transfers, MA record books and past MA questionnaires conducted in HVR [5]. MA were examined and taken in picture. Financial data were collected from MC. A standard questionnaire collected MA data : MA sponsor, motorcycle brand, type of canvas, BS registration number (notified on a plaque fixed on MA canvas), total kilometers run, as recorded by milometer or calculated from MA record book, date of arrival of MA in HC, number of transfer of sick patients from home to HC or from HC to hospital, as recorded by MC or, if available, a local Complementary Health Insurance (CHI), driver’s training and retribution, presence of concrete road near HC, and maintenance by a motorcycle mechanic with available spare parts for HC’s MA.
Data were collected in Excel© tables [21] and transferred to Stata© [22].
Data on Stata were analyzed, in univariate and multivariate, by Cox method. In multivariate, only factors with a p at most 0.20 have been included [22]. Final results in multivariate were considered significant when p was under 0.05.
No anterior censorship had to be included in the Cox analysis, because date of MA arrival in HC was precisely known by BS. No posterior censorship had to be taken in account because date of “death” was known by MC and has occurred for all active MA investigated.
4.Results and Discussion
Seven MA could not be included in the survival study because staying inactive when sent to HC. One (in HC Mahon) because the MA was delivered out-of-order, one (in HC Diama) because population refused a MA with two-wheel trailer (figure 1), three MA (one in HC Tigan, two in HC Karankasso- Viguë) because the population estimated that the stretcher, covered with a hood protecting the patient from rain (figure 2), gave to MA the aspect of a “hearse”, one (in HC Bama) because of the donation, at the same time, of a FWD ambulance-car, and one, in HC Guema, because the medical staff refused to evacuate patients with MA. The different MA trades, with their year of HC inclusion in the study, are presented figure 3.
The benefit of covering stretcher by plastic hood, in case of rain, and which could be removed in dry season, was not openly discussed with the population, necessary to protect patients in rainy season (May-September). Many MC provided rainy coats to MA driver. Unused MA should have been forwarded to HC in need of a patients transfer mean, when their MA became out-of-use.
3,021 sanitary evacuations have been made by the remaining active 56 MA. The beneficial aspect of MA is evident on this number, even if a Death Averted Life Years (DALY) study was not possible with a retrospective study of this type. On survival curve (Kaplan-Meier) MA medium survival was 8 months, mean survival 22 months and maximum survival 62 months (figure 4). The Kaplan-Meier curve shows the classic picture of biologic survival curve.
In univariate (table 2) and multivariate (table 3) are shown factors which could interfere with MA survival. In multivariate analysis, only one factor has significantly (p=0.03) modified (decreasing) MA survival: the use of motorcycle brand Jianshe©, from Popular China.
Validity and reliability of the data collected: With an administrative location of MA, we can consider that different types of MA were distributed at random. With the big number of factors which were considered as possibly modifying MA lifespan, true data quantification is difficult to ascertain. For such a retrospective study, it took a long time to consult all the documentation about MA, and discuss with MC members, mechanics and drivers, which were often illiterate. The medical student, fluent in local languages used in this part of the country, could accurately collect data and cross-compare them from different sources [20]. The composition of the team: one junior and one senior epidemiologist, diminished biases of analysis. Of course the data are limited to the African context.
If a local CHI, the presence of a mechanic with spare parts, the number of HC consultations per year and the number of kms performed before death of MA were found to be significantly beneficial to MA survival in univariate analysis, they were not significant in multivariate analysis. Multivariate analysis, taking in analysis all parameters susceptible to interfere with MA survival, was eased by the big number of MA analyzed. Burkina Faso is the only country in Africa with such a big local production and use of MA. A prospective cohort analysis would have been however more suitable for estimating MA impact on QALY. Wilson’s study recommended also MA for obstetric urgencies [24].
Driver training and retribution had no significant impact on MA survival in this study but this retribution was low and the driver, which often was a HC caretaker or a MC volunteer, was often illiterate, without formal education, but able however to do basic MA maintenance [3].
There was also no correlation between MA survival and price charged (by km traveled) for patient’s transfer, even if more money brought by MA to MC was expected to bring more funds for maintenance, and there was also no evident impact of concrete road near HC on MA survival.
The decreased survival with Jianshe© brand was confirmed by less strength of Jianshe spare parts (engine’s piston, motorcycle frame, even tubes and tires), and the difficulty to find those spare parts in rural Burkina Faso, as reported by MC. This brand was chosen by Switzerland for economic reasons, Jianshe© being less expensive than Peugeot© and Yamaha© motorcycles. The presence of a local CHI had a significant impact on survival only in univariate, but not in multivariate analysis. Following discussion with MC, the creation of local CHI was often the consequence of the heavy maintenance costs of Jianshe© MA. Difference of motorcycle brand survival should have been studied by sponsors before a large scale production by BS. Even if MA built by BS are now out-of- action, new tricycle MA, more comfortable for patients, driver, and family assisting evacuee, but more expensive, have now the favor of sponsors and rural population (figure 5).
The low MA lifespan could have been increased by BS proposal of MA periodic maintenance on PCDRP budget, conducted locally by a Swiss mechanic volunteer, travelling by motorcycle, with MA spare parts at hand. He could have also increased level of competence of MA mechanics around HC. This option, proposed by BS, was not followed by a Swiss action. This type of MA maintenance follow-up has been also suggested in South-Africa [25].
References