Table 6 Strain and strain rate parameters of the study population (firefighters, police officers, and office workers).
Variables | Firefighters (FFs) (n = 97) | Police officers (POs) (n = 55) | Office workers (OWs) (n = 46) | Linear regression Estimated difference [95%-CI], p-value (adjusted for age) | ||
|---|---|---|---|---|---|---|
Mean ± SD | Mean ± SD | Mean ± SD | OWs vs. FFs | POs vs. FFs | POs vs. OWs | |
Three chamber strain (%) | 20.6 ± 3.7 | 20.1 ± 3.2 | 20.0 ± 2.9 | −0.56 (−1.76–0.65) p = 0.365 | −0.37 (−1.58–0.85) p = 0.553 | 0.12 (−1.11–1.35) p = 0.847 |
Four chamber strain (%) | 20.4 ± 3.2 | 19.1 ± 2.8 | 20.1 ± 3.0 | −0.38 (−1.46–0.70) p = 0.491 | −1.22 (−2.23–0.21) p = 0.018 | −1.04 (−2.22–0.14) p = 0.083 |
Two chamber strain (%) | 21.1 ± 3.7 | 19.4 ± 3.5 | 21.1 ± 3.3 | −0.04 (−1.28–1.19) p = 0.944 | −1.64 (−2.81–0.47) p = 0.006 | −1.72 (−3.10–0.35) p = 0.014 |
Average strain (%) | 20.7 ± 2.8 | 19.6 ± 2.6 | 20.4 ± 2.7 | −0.33 (−1.31–0.66) p = 0.510 | −1.08 (−2.01–0.14) p = 0.024 | −0.88 (−1.94–0.19) p = 0.106 |
LV Longitudinal Strain (%) | 20.1 ± 3.1 | 19.5 ± 2.6 | 20.2 ± 2.9 | 0.16 (−0.86–1.19) p = 0.754 | −0.34 (−1.22–0.54) p = 0.446 | −0.75 (−1.84–0.34) p = 0.176 |
LV Longitudinal Strain Rate (1/s) | 0.99 ± 0.21 | 0.95 ± 0.15 | 1.01 ± 0.18 | 0.04 (−0.03–0.11) p = 0.267 | −0.02 (−0.08–0.03) p = 0.373 | −0.07 (−0.13–0.00) p = 0.051 |
