Table 2.
Subgroup analysis in function of KardiaMobile numerical precision compared to conventional electrocardiogram
| Characteristics | N | Numerical precision† |
P | |
|---|---|---|---|---|
| Cases | Percentage | |||
| Number | 128 | 119 | 93.0% | |
| Sex | ||||
| Male | 61 | 56 | 91.8% | |
| Female | 67 | 63 | 94.0% | .623 |
| SARS-CoV-2 infection | ||||
| Probable and confirmed | 40 | 34 | 85.0% | |
| Ruled out | 88 | 85 | 96.6% | .017‡ |
| Heart failure history | ||||
| Yes | 53 | 49 | 92.5% | |
| No | 75 | 70 | 93.3% | .848 |
| Blood hypertension history | ||||
| Yes | 78 | 74 | 94.9% | |
| No | 50 | 45 | 90.0% | .293 |
| Potentially QT-prolonging drugs | ||||
| Yes | 65 | 60 | 92.3% | |
| No | 63 | 59 | 93.7% | .766 |
Data are presented as number and percentage.
P value obtained through χ2 test.
†
Numerical precision was defined as the proportion of KardiaMobile (AliveCor, San Francisco, CA) QT interval measurements with less than 10 ms difference from conventional electrocardiogram measurements.
‡
P < .05.