Table 1.
Demographic and anthropometric characteristics of the study participants.
| Night shift workers |
|||
|---|---|---|---|
| Demographics | Exercise | No exercise | p |
| N | 12 | 12 | ns |
| Male sex, n (%) | 5 (42) | 3 (25) | ns |
| Age (years) | 34.2 ± 8.6 | 37.3 ± 13.7 | ns |
| Anthropometrics | |||
| BMI (kg/m2) | 26.8 ± 5.6 | 27.8 ± 6.9 | ns |
| Waist/Hip ratio | 0.9 ± 0.1 | 0.9 ± 0.1 | ns |
| Work history | |||
| No. of years on night shift [median (IQR)] | 9.5 (4.5; 20.5) | 6.0 (4.3; 21.0) | ns |
| No. of night shifts/month [median (IQR)] | 6.0 (5.0; 7.0) | 6.0 (5.0; 8.5) | ns |
| Health care provider (nurse, physician), n (%) | 7 (58) | 7 (58) | ns |
| Firefighter, police officer, n (%) | 3 (25) | 2 (17) | ns |
| Worker in industry, employee, n (%) | 1 (8.5) | 3 (25) | ns |
| Bus or taxi driver, n (%) | 1 (8.5) | 0 (0) | ns |
| Cardiometabolic parameters | |||
| Systolic blood pressure (mm Hg) | 122.5 ± 9.8 | 120.7 ± 7.3 | ns |
| Diastolic blood pressure (mm Hg) | 74.4 ± 8.4 | 76.8 ± 6.7 | ns |
| Heart rate (1/min) | 66.2 ± 13.3 | 71.5 ± 6.2 | ns |
| Fasting glucose (mg/dL) | 94.4 ± 23.9 | 86.4 ± 8.3 | ns |
| HbA1c (%) | 5.2 ± 0.6 | 4.9 ± 0.3 | ns |
| Physical training status | |||
| VO2max (mL/min/kg) | 35.8 ± 7.3 | 30.1 ± 6.8 | ns |
| Relative physical performance (W/kg) | 2.7 ± 0.7 | 2.2 ± 0.6 | ns |
| Maximal heart rate (beats/min) | 172.6 ± 11.0 | 172.8 ± 17.5 | ns |
BMI: body mass index; IQR: interquartile range; HbA1c: glycated haemoglobin; VO2max: maximal oxygen uptake.
Data are given as mean ± standard deviation, unless indicated otherwise.