Table 2.

Effect of different temperature ranges on AQI – COVID 19 confirmed cases association.

Temperature range	Relative risk, 95% CI
T < −20 °C (− 22.8 ≤ °C T < −20 °C)	1 (1, 1) (reference group)
−20 °C ≤ T < −10 °C	1.0039684 (1.00114264, 1.00704327)
−10 °C ≤ T < 0 °C	1.00711894 (1.0044128, 1.01009672)
0 °C ≤ T < 10 °C	1.00635137 (1.00372986, 1.00925885)
10 °C ≤ T < 20 °C	1.00886322 (1.00613776, 1.01185857)
T ≥ 20 °C (20 °C ≤ T < 24.9 °C)	1.00646535 (1.00396607, 1.00897226)