A methodology for measuring regional impact of covid-19


COVID-19 has changed our way of life and experts have labelled the pandemic as the most crucial global health calamity of the century and the greatest challenge that humankind faced since World War II. It will be recorded as not only one of the most pressing issues of our time, but also as an occurrence which has most acutely highlighted the fault lines in our society.

What started as a regional health crisis in late 2019 had, by March of 2020 grown into a global pandemic never seen for a century

This brief article seeks to measure the regional impact of the COVID-19 and to monitor the effect of the pandemic on various regions to assist policy interventions to fight it.


Twenty-two (22) data sets on the pandemic were collected from the Ghana Health Service, Ministry of Health, for a period of three-and-half months from 15th April to 31st July 2020. Each data set included the number of new COVID-19 cases, total confirmed cases, deaths, recoveries/discharged, active cases, regional and gender distributions. This information was regularly shared among the two Municipal Assemblies, the Traditional Authority and the Root-based institutions (RBI) who carried out joint exercises aimed at re-enforcing the President’s directives buttressed with precautionary measures initiated by the Omanhene of the New Juaben Traditional Area to fight the pandemic.

The data sets, which permitted a higher level of comparative analysis on the regions, also led to the development of a methodology to measure the impact of COVID-19 on these regions using the concepts of ratio of proportionality and percentage points differentials. The methodology also permits the test of reliability of the results using the invariance principle under the change of axis.

This methodology involves comparative data on the percentage shares of the regions in the latest national population census (2010) as against their respective shares in the COVID-19 pandemic.

A measure of the relative impact of the pandemic on a particular region is then derived by the percentage points differential of the region’s population share and its pandemic share.

For example, if A represents the population share and B the COVID-19 share of a particular region, then the percentage points differential (A-B) measures the relative impact of the pandemic on that region.

On this basis, a region will be doing relatively well with respect to COVID-19 impact if the differential (A-B) is positive but relatively worse if it is negative.

A test of the reliability of the results is provided when the sum total of all the regional impacts is identically zero on account of the invariance principle.

Since the methodology requires a regional population share during the latest census in 2010, the four regions which were affected by the creation of new regions in 2018, namely, Northern, Western, Volta and Brong Ahafo, have been pulled together for analytical purposes to make the analysis complete.

Thus, data for Volta and Oti were pulled together under Volta Region; data from Northern, North East and Savannah were combined as Northern Region; data from Bono, Ahafo and Bono East were combined as Brong Ahafo Region whilst data from Western and Western North were combined as Western Region. The pulling of the affected regions to their 2010 status provided the requisite data for their respective population shares and also ensured their vital inclusivity in the analysis.

As at 31st July 2020, the cumulative reported COVID-19 cases in the country were 35,501 distributed among the regions as follows: Greater Accra, 18,273; Ashanti, 8,770; Eastern, 1,416; Central, 1,430; Upper West, 88; Upper East, 282; Western (Western and Western North), 2,946; Volta (Volta and Oti), 785; Brong Ahafo (Bono, Ahafo and Bono East), 1,086; and Northern (Northern, Savannah and North East), 425.

To obtain the COVID-19 share of any region is a simple matter of dividing that region’s cumulative reported cases given above by the total country cumulative figure of 35,501 and then multiplying the result by 100.

For example, COVID-19 share for Greater Accra Region is (18,273/35,501)*100=51.47 percent while that of the Northern Region is (425/35,501)*100=1.2 percent.

Table 1.0 provides comparative data on the percentage shares of the regions in the latest national population census (2010), their respective COVID-19 percentage shares and the impact measures of the pandemic on the various regions.

The Table indicates that the Northern Region including the Savannah and the North East, came first with a relative impact measure of 8.86 percentage points followed by the Eastern Region with 6.69 percentage points.

Two regions, namely, Greater Accra and Ashanti were in the negative zone of -35.21 and -5.31 percentage points respectively. The table is arranged in descending order of magnitude with respect to the impact measure. Thus Volta Region came third, Brong Ahafo (Bono, Ahafo and Bono East) fourth, Central fifth, Upper East sixth, Upper West seventh, Western (Western and Western North) eight, Ashanti ninth and Greater Accra tenth.

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