Table 2 Number of individuals tested (n), Plasmodium falciparum (Pf) prevalence estimate and 95% confidence interval (CI) by year and travel group

From: Impact of six-month COVID-19 travel moratorium on Plasmodium falciparum prevalence on Bioko Island, Equatorial Guinea

Group and Year

Individuals Tested (n)

Pf Prevalence (95% CI)

Difference in Prevalence (95% CI)

Difference in Differences (95% CI)

Unadjusted

Adjusted±

Unadjusted

Adjusted±

Low travel -2019

2268

7.3% (4.5, 10.1)

5.5 (0.9,10.1)

5.8 (0.5,11)

−7.4 (−12.1,−2.6)

−9.2 (−14.5,−3.9)

Low travel -2020

1721

12.8% (7.2, 18.5)

High travel -2019

4249

13.6% (12.4, 14.9)

−1.9 (−3.2,−0.5)

−3.4 (−5.1,−1.8)

High travel -2020

3890

11.8% (10.0, 13.5)

  1. Difference in prevalence compares 2020 to 2019 prevalence by travel area. The difference in differences compares to two prevalence differences. Differences are presented for the adjusted and unadjusted models. Estimates and CIs are derived from linear combinations of the outputs from a design-based linear regression model.
  2. ±Adjusted for coverage of Indoor Residual Spraying (IRS), going indoors before 7PM, within island travel, and air conditioning.
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