Table 3 Distribution of outcome measures
Continuous stress variables | N | Mean | SD | Median | Min | Max |
|---|---|---|---|---|---|---|
Perceived stress score (0 to 40) | 87 | 20.7 | 4.30 | 21.0 | 11.0 | 32.0 |
Burnout score (1-7) | 97 | 3.0 | 0.90 | 3.1 | 1.0 | 5.1 |
 Physical fatigue | 97 | 3.4 | 1.03 | 3.7 | 1.0 | 6.0 |
 Emotional exhaustion | 97 | 2.5 | 1.27 | 2.3 | 1.0 | 5.7 |
 Cognitive weariness | 97 | 2.8 | 1.08 | 3.0 | 1.0 | 4.8 |
HRV measures | ||||||
 Rmssd | 92 | 60.5 | 33.0 | 54.2 | 15.6 | 167.6 |
 lnRmssd | 92 | 4.0 | 0.54 | 4.0 | 2.7 | 5.1 |
 Sdnn | 92 | 75.6 | 50.05 | 62.5 | 21.6 | 287.2 |
Hair cortisol level (pg/mg) | 44 | 44.2 | 60.88 | 20.5 | 3.8 | 236.2 |
log Cortisol | 44 | 3.2 | 1.03 | 3.0 | 1.3 | 5.5 |
Categorical stress variables | N | % | Â | Â | Â | Â |
Perceived stress from PSS | ||||||
 Low stress (0–13) | 3 | 3.5 |  |  |  |  |
 Moderate stress (14–26) | 74 | 85.1 |  |  |  |  |
 High stress (27–40) | 10 | 11.5 |  |  |  |  |
Burnout from SMBS | ||||||
 No burnout (≤2.0) | 15 | 15.5 |  |  |  |  |
 Low burnout (2.1 to 3.75) | 63 | 65.0 |  |  |  |  |
 High burnout (≥3.75) | 19 | 19.6 |  |  |  |  |