Table 2 Episode Characteristics.
From: Engaging a national-scale cohort of smart thermometer users in participatory surveillance
Episodes | |||
|---|---|---|---|
With reported symptoms | Without reported symptoms | p-value | |
No. | 1,735,805 | 1,793,572 | |
New participant, No. (%) | 767,774 (44.2) | 558,071 (31.1) | < 0.001 |
Fever, No. (%) | 425,130 (24.5) | 287,414 (16.0) | < 0.001 |
Severe fever, app skipped symptom page, No. (%) | 154,406 (8.9) | 133,056 (7.4) | < 0.001 |
Season | < 0.001 | ||
Spring | 439,418 (25.3) | 571,638 (31.9) | |
Summer | 361,504 (20.8) | 443,911 (24.8) | |
Autumn | 441,102 (25.4) | 374,107 (20.9) | |
Winter | 493,781 (28.4) | 403,916 (22.5) | |
Pandemic period, No. (%) | < 0.001 | ||
Before pandemic (01/01/2020–02/29/2020) | 61,087 (3.5) | 83,664 (4.7) | |
First outbreak (03/01/2020–05/15/2020) | 145,361 (8.4) | 270,144 (15.1) | |
Second wave (05/16/2020–09/12/2020) | 190,840 (11.0) | 314,955 (17.6) | |
Winter wave (09/13/2020–03/06/2021) | 445,190 (25.6) | 332,553 (18.5) | |
Fourth wave (03/07/2021–07/14/2021) | 174,969 (10.1) | 158,103 (8.8) | |
Delta wave (07/15/2021–12/18/2021) | 245,098 (14.1) | 199,176 (11.1) | |
Omicron BA.1/2 wave (12/19/2021–06/19/2022) | 312,114 (18.0) | 282,658 (15.8) | |
Omicron BA.4/5 wave (06/20/2022–10/29/2022) | 161,146 (9.3) | 152,319 (8.5) | |
