Table 2 Model comparison.

From: Association of air pollution and weather conditions during infection course with COVID-19 case fatality rate in the United Kingdom

Model

Model expression

RMSE

Model 5

\(\alpha +{\alpha }^{k}+\delta {W}_{t}+f\left(S\right)+f\left(T\right)+f(P{M}_{10})\)

Regional random effect, temperature, sunlight duration and particular matter \((\le 10)\) μm

0.08868

Model 6

\(\alpha +{\alpha }^{k}+\delta {W}_{t}+f\left(S\right)+f\left(T\right)+f(P{M}_{2.5})\)

Regional random effect, temperature, sunlight duration and particular matter \((\le 2.5)\) μm

0.08555

Model 7

\(\alpha +{\alpha }^{k}+\delta {W}_{t}+f\left(S\right)+f\left(T\right)+f(P{M}_{2.5})+\gamma {H}_{t-\left({t}_{1}+{t}_{2}\right)}^{k}\)

Regional random effect, , temperature, sunlight duration, particular matter \((\le 2.5)\) μm and humidity

0.08717

  1. The three candidate models (Models 5–7) were compared using predicted results.
  2. RMSE root mean squared error.
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