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. 2023 Mar 29;23:187. doi: 10.1186/s12879-023-08168-1

Table 5.

Estimated seasonal variation adjustment per quarter for number of COVID-19 cases in DRC, Nigeria, Senegal, and Uganda

Country Year Quarter Adjustment
1 2 3 4 Factor
Nigeria 1 10,537 -10,547
2 10,556 -10,566 10,575 -10,585
3 10,594 -10,603 10,613 -10,622
4 10,631 -10,641 10,650
Average 10,593.78 -10,603.2 10,593.75 -10,584.4 -0.03472
0.034722 0.034722 0.034722 0.034722
Adjusted Seasonal Index 10,593.81 -10,603.2 10,593.78 -10,584.4
DRC 1 - - -247 243
2 -239 235 -232 228
3 -224 220 -216 213
4 -209 205 -201 -
Average -223.94 220.1616 -223.937 227.7188 0.000618
-0.00062 -0.00062 -0.00062 -0.00062
Adjusted Seasonal Index -223.941 220.1609 -223.938 227.7182
Senegal 1 - - 1879 -1882
2 1886 -1890 1893 -1896
3 1899 -1903 1907 -1909
4 1913 -1917 1920 -
Average 1899.333 -1903.33 1899.75 -1895.89 -0.03472
0.034722 0.034722 0.034722 0.034722
Adjusted Seasonal Index 1899.368 -1903.3 1899.785 -1895.85
Uganda 1 -781 767
2 -754 739 -725 711
3 -697 683 -668 654
4 -640 625 -611
Average -696.778 682.5556 -696.333 710.6667 0.027778
-0.02778 -0.02778 -0.02778 -0.02778
Adjusted Seasonal Index -696.806 682.5278 -696.361 710.6389