Table 3.
Assumptions of Test date-Daily new cases-Infection date-Weather information matching process and correlational comparison of results in four assumptions.
| Daily new cases |
|||||
|---|---|---|---|---|---|
| Test date = Infection date | Test date = Infection date +5 days | Test date = Infection date +6 days | Test date = Infection date +14 days | A portion of the data samples could have been tested at 5, other portion at 6, or other portion at 14 and some at unknown incubation dates. | |
| Minimum temperature (°C) | 0.062 | 0.096 | 0.009 | −0.018 | Limitation (Future studies could employ Vector AutoRegressive Models ) |
| Maximum temperature (°C) | 0.347⁎⁎ | 0.220 (p = .081) | 0.118 | −0.015 | |
| Average temperature (°C) | 0.224 | 0.119 | 0.067 | −0.091 | |
| Normal temperature (°C) | 0.293⁎ | 0.293⁎ | 0.293⁎ | 0.293⁎ | |
| Precipitation(mm) measured at 07 am | −0.285⁎ | −0.141 | −0.287⁎ | −0.216 | |
| Wind speed (m/s) | 0.174 | 0.147 | 0.127 | −0.140 | |
| Highest wind speed (m/s) | 0.233 | 0.177 | 0.076 | −0.156 | |
Note; Assumptions of matching Test date-Daily new cases-Infection date-Weather information were drawn before the correlational analysis. Findings on the first column are based on an assumption that testing was conducted without requirement of any symptoms as a pre-requisite for testing (e.g. a public mass testing campaigns). In this case, it could be that infection date and testing date are the same. Therefore weather information of the test date were considered in the analysis. Second is, an incubation period of days were considered since the Norwegian institute of public health at some point had some recommendations that testing should be conducted for people only with acute respiratory tract infection symptoms (e.g. fever, cough or breathing difficulties, or who a doctor suspects has COVID-19). In this case, infection date was considered 5, 6 or 14 days (corona incubation periods, 5–6 are common) before test date. Accordingly, weather information 5 days, 6 days or 14 days earlier to the testing date were considered in the correlation analysis column 2, column 3 or column 5 respectively.
** Correlation is significant at the 0.01 level;
* Correlation is significant at the 0.05 level.