Descriptive characteristics of the 149 subjects participating in the study, by study centre
| Athens | London | Milan | Stockholm | |
| (n=46) | (n=20) | (n=50) | (n=33) | |
| Systolic dipping (mean; SD) (%) | 13.6 (6.53) | 17.2 (5.91) | 13.5 (6.51) | 17.1 (6.68) |
| Diastolic dipping (mean; SD) (%) | 15.3 (8.26) | 20.4 (6.52) | 16.0 (7.21) | 19.3 (8.12) |
| 24-h systolic BP (mean; SD) mm Hg | 120 (16.1) | 115 (14.1) | 118 (14.6) | 116 (17.6) |
| 24-h diastolic BP (mean; SD) mm Hg | 72 (11.2) | 71 (11.4) | 72 (11.0) | 71 (11.9) |
| Awake systolic BP (mean; SD) mm Hg | 129 (14.1) | 126 (9.9) | 127 (11.8) | 127 (13.7) |
| Awake diastolic BP (mean; SD) mm Hg | 78 (10.2) | 79 (8.7) | 79 (9.3) | 78 (9.9) |
| Asleep systolic BP (mean; SD) mm Hg | 111 (13.2) | 104 (8.7) | 109 (11.8) | 105 (14.1) |
| Asleep diastolic BP (mean; SD) mm Hg | 66 (8.6) | 62 (7.1) | 66 (8.6) | 63 (8.8) |
| Age (mean; SD) years | 53 (7.7) | 58 (7.3) | 56 (7.9) | 56 (6.3) |
| Sex (n; male %) | 15 (32.6) | 8 (40.0) | 26 (52.0) | 16 (47.1) |
| Chronic exposure to noise (n; exposed %) | 29 (63.0) | 10 (50.0) | 33 (66.0) | 15 (44.1) |
| Smoking habits (n; yes %) | 22 (52.2) | 0 (0.0) | 6 (12.0) | 5 (14.7) |
| BMI (mean; SD) kg/m2 | 28 (4.1) | 26 (2.3) | 26 (4.4) | 26 (3.6) |
| Working on the day of measurements (n; yes %) | 18 (39.1) | 7 (35.0) | 17 (34.0) | 31 (91.2) |
BMI, body mass index; BP, blood pressure.