Table 2.
Cardiovascular risk assessments between dayshift only and day-night shift drivers
| Participants (n=607) | Day shifts (n=305) |
Day–night shifts (n=302) | P value | |
| Framingham Risk Score | ||||
| 10-year Framingham risk percentage, n | 585 | 295 | 290 | 0.05 |
| 10-year Framingham risk percentage, median (IQR) | 3.21 (1.66–5.99) | 3.52 (1.95–6.23) | 2.98 (1.47–5.56) | |
| Low risk (<10%), n (%) | 518 (88.5%) | 265 (89.8%) | 253 (87.2%) | |
| Intermediate risk (10%–20%), n (%) | 52 (9.0%) | 24 (8.1%) | 28 (9.7%) | |
| High risk (>20%), n (%) | 15 (2.5%) | 6 (2.0%) | 9 (3.1%) | |
| ASCVD risk score | ||||
| 10-year ASCVD risk percentage, n | 215 | 111 | 104 | 0.94 |
| 10-year ASCVD risk percentage, median (IQR) | 5.13 (3.62–7.20) | 5.16 (3.64–6.66) | 5.12 (3.57–7.63) | |
| Low risk (<5%), n (%) | 103 (47.9) | 54 (48.6%) | 49 (47.1%) | |
| Intermediate risk (5%–20%), n (%) | 107 (49.8%) | 55 (49.5%) | 52 (50.0%) | |
| High risk (≥20%), n (%) | 5 (2.3%) | 2 (1.8%) | 3 (2.9%) | |
| Cornell LVH | ||||
| LVH based on criteria >2.8 mV, n (%) | 555 | 14 (4.9%) | 9 (3.3%) | 0.33 |
| LVH based on product >244 mVms, n (%) | 547 | 18 (6.5%) | 11 (4.1%) | 0.21 |
| Solokow-Lyon LVH | ||||
| LVH based on criteria >3.5 mV, n (%) | 581 | 92 (31.7%) | 94 (32.3%) | 0.88 |
| LVH combined, n (%) | 582 | 105 (36.1%) | 104 (35.7%) | 0.93 |
| CIMT | ||||
| Mean CCA IMT (mm), median (IQR) | 217 | 0.54 (0.50–0.70) | 0.52 (0.49–0.59) | 0.10 |
| Max CCA IMT (mm), median (IQR) | 217 | 0.62 (0.57–0.70) | 0.60 (0.55–0.66) | 0.12 |
| Max bulb IMT (mm), median (IQR) | 216 | 0.70 (0.60–0.86) | 0.61 (0.51–0.75) | 0.01 |
| Carotid plaque, n (%) | 216 | 5 (4.1%) | 4 (4.3%) | 0.93 |
ASCVD, arteriosclerotic cardiovascular disease; CCA, common carotid artery; CIMT, carotid intima–media thickness; IMT, intima–media thickness; LVH, left ventricular hypertrophy.