Study site and population
The survey was conducted in the Volta Region of Ghana. The region is one of the 16 regions in the country (previously 10) (Ghana Statistical Service [GSS], 2013). The Volta Region is located between latitudes 50 45‟N and 80 45‟N along the southern half of the eastern border of Ghana, which it shares with the Republic of Togo. The region shares boundaries to the west with Greater Accra, Eastern and Brong Ahafo regions, to the north with the Northern Region, and has the Gulf of Guinea to the south. The region’s total land area is 20,570 square kilometres, representing 8.7% of the total land area of Ghana (GSS, 2013), with a population of 1,865,332, with about 72% living in rural areas. The Volta Region has a total of 326 health institutions out of which 242 are administered by the GHS, 18 are mission owned, one is quasi-government, and 65 are privately owned (GSS, 2013).
The study was conducted in four districts/municipalities out of the 18 districts/municipalities of the Volta Region. These four districts/municipalities include Ho West District, Ketu South Nkwanta South (now in the newly created Oti Region) and Hohoe Municipalities. According to the 2010 Population and Health Census of Ghana, the total number of households in Hohoe is 43,329, Ketu South is 39,119 while Ho West and Nkwanta South have 23,875 and 22,733 respectively. The study population from these sites comprised men and women aged 18- 70 years from selected households.
Study Design
This was a cross-sectional household survey involving a multi-staged sampling of household members between the ages of 18 to 70 years. The first stage involved random sampling of four districts from the three ecological zones (savanna, middle, and coastal zones) of the region. Ketu South district was selected for the coastal ecological zone, Nkwanta South district for the savanna while Ho West and Hohoe were selected for the middle zone.
The second stage of the sampling involved the use of a simple random sampling of thirty communities from each of the study sites and in each community, fifteen households were randomly selected for the third stage. For the selection of the 15, the random walk technique was adopted. With this technique, interviewers selected the first housing unit by moving clockwise from the centre of the community and then followed a specific path of travel to select the rest of the housing units. Finally, the fourth stage of the sampling involves the random sampling of the available adults in each household sampled.
Sample Size
Based on the 2010 populations of the household for the four districts populations, Yamane’s (1998) formula for sample size determination was used to determine the minimum number of participants for this study.
With the formula Where n is the minimum sample size to be determined, N is the study population, and α󠆿 is the margin of error which was 0.05 at a significance level of 95% and adding 10% non-response rate, the minimum participants for the four districts were 436 for Ketu South, 433 for Ho West, 437 for Hohoe, and 432 for Nkwanta South resulting in a minimum sample size total of 1738 participants.
Data collection procedure
Data were collected with a structured questionnaire electronically administered using a Computer Assisted Personal Interview (CAPI) installed in smartphones of data collectors. The data collection exercise took place from February to April 2019 from 9 am to 2 pm each weekday.
Information such as age, gender, occupation, income level, level of education, and religion was obtained to highlight the demographic characteristics of the participants. Questions on health-seeking behaviour were also asked and they include, whether fever was experienced in the past 3 days, r, and what was done after the onset of symptoms. Questions on ownership, use of ITN and the use of sprays coils and the use of other vector control practices, were also asked.
Data Analysis
Electronic data were downloaded into a single master (Microsoft excel 2016 spreadsheet) database following completion of the fieldwork and Statistical Package for the Social Sciences (SPSS) version 22, was used for analysis. Descriptive statistics comprising frequencies and proportions were used to summarize sociodemographic variables and malaria prevention practices among the participants. Chi-square was used to test for significance of associations between socio-demographic variables and malaria prevention practices such as ownership and use of ITN and health-seeking behaviour like actions taking after the onset of fever among participants. Multivariate logistic regression analysis was used to test the strength of the association between socioeconomic variables and ownership and the use of ITN variables. All analysis was done using 95% confident intervals and statistical significance set as p≤0.05
Ethical considerations
Ethical clearance for the survey was obtained from the UHAS Review Ethics Committee (UHAS-REC A.6 [7] 17/18). Permission was also sought from the district/municipal health directorates and traditional authorities of the various communities before data were collected. Written Informed consent was obtained from participants before including them in the study. Confidentiality was also ensured by using initials and questionnaire number codes instead of real names.