Table 3.
Demographics and the results of the Object Memory task in the battery test
| Measure | All (n = 80) | COVID (n = 36) | Control (n = 44) | Statistic | ||
|---|---|---|---|---|---|---|
| Age, years, mean (SD) | 26.8 (8.2) | 27.4 (8.6) | 26.3 (8.0) | t(78) = 0.6, P = 0.6, BF = 3.7 | ||
| Gender, female, n (%) | 31 (38.8) | 14 (38.9) | 17 (38.6) | χ 2(1,N = 31) = 0.0, P = 1.0 | ||
| COVID-19 | Time from COVID-19 diagnosis, mean days (SD) | 233.8 (129.1) | ||||
| COVID-19 test type: PCR/lateral flow/unknown/not tested | 26/2/3/5 | |||||
| Stayed at hospital overnight for COVID-19 treatment, yes (%) | 0 (0.0) | |||||
| Stayed at ICU for COVID-19 treatment, yes (%) | 0 (0.0) | |||||
| Object Memory | Immediate memory test | Accuracy, mean % (SD) | 60.1 (20.9) | 60.0 (15.9) | 60.1 (24.4) | t(78) = −0.02, P = 1.0, BF = 4.3 |
| RT in s, mean (SD) | 3.3 (1.8) | 3.2 (1.6) | 3.4 (2.0) | t(78) = −0.4, P = 0.7, BF = 4.0 | ||
| Delayed memory test | Accuracy, mean % (SD) | 57.6 (21.0) | 52.5 (20.6) | 61.8 (20.7) | t(78) = −2.0, P = 0.05, BF = 1.3 | |
| RT in s, mean (SD) | 2.3 (0.8) | 2.2 (0.6) | 2.4 (1.0) | t(78) = −1.3, P = 0.2, BF = 2.1 | ||
| Memory decrement (normalized by immediate accuracy) | Percentage change in accuracy, mean % (SD) | 3.0 (46.8) | −13.6 (21.4) | 16.6 (56.9) | t(78) = −3.0, P = 0.003, BF = 10.7 | |
| Time between immediate and delayed tests | Duration in minutes, mean (SD) | 28.8 (9.4) | 27.9 (8.7) | 29.6 (9.9) | t(78) = −0.8, P = 0.4, BF = 3.2 | |
The time from COVID-19 diagnosis was computed as the days between the date they attended this battery test and the self-reported date of their positive COVID-19 test. T- and χ2 tests used to assess between-group differences, with Bayes Factor (BF) reported. The significant t-tests are highlighted in bold.