TABLE 1.
Descriptive statistics of the Oman Family Study stratified by sex
| Men | Women | ||||
|---|---|---|---|---|---|
| Characteristics | N | Statistica | N | Statistica | P value |
| Anthropometric measurements | |||||
| Age (years) | 554 | 26.5 (20.0–42.0) | 677 | 30.0 (22.0–45.0) | NS |
| Height (cm) | 554 | 165.7 (7.3) | 677 | 152.2 (5.5) | <0.01 |
| Weight (kg) | 554 | 67.0 (58.0–77.0) | 677 | 56.0 (49.5–67.0) | <0.01 |
| BP measures | |||||
| Daytime SBP (mmHg) | 534 | 127.0 (121.0–135.0) | 644 | 119.0 (111.0–128.0) | <0.01 |
| Daytime DBP (mmHg) | 534 | 82.0 (76.8–89.0) | 644 | 80.0 (74.0–88.0) | <0.01 |
| Sleep SBP (mmHg) | 513 | 109.0 (102.0–118.5) | 625 | 104.0 (95.0–114.5) | <0.01 |
| Sleep DBP (mmHg) | 513 | 68.0 (61.0–75.0) | 625 | 66.0 (59.0–73.0) | <0.05 |
| Total 24-h SBP (mmHg) | 523 | 124.0 (117.0–131.0) | 632 | 116.0 (108.0–125.0) | <0.01 |
| Total 24-h DBP (mmHg) | 523 | 79.0 (74.0–86.0) | 632 | 77.0 (71.3–84.0) | <0.01 |
| Office beat-to-beat SBP (mmHg) | 507 | 116.4 (108.2–124.9) | 616 | 105.1 (98.2–113.0) | <0.01 |
| Office beat-to-beat DBP (mmHg) | 507 | 74.0 (68.0–82.1) | 616 | 66.6 (60.4–73.0) | <0.01 |
| Obesity index | |||||
| BMI (kg/m2) | 554 | 24.6 (20.9–28.2) | 677 | 24.7 (21.2–28.6) | NS |
| Body fat (%) | 537 | 17.9 (8.4) | 657 | 28.2 (9.8) | <0.01 |
| Waist circumference (cm) | 537 | 81.0 (14.3) | 657 | 81.2 (14.5) | NS |
| Waist-to-height ratio | 537 | 0.49 (0.09) | 657 | 0.53 (0.10) | <0.01 |
The daytime and sleep periods were determined for each participant according to their actual waking and sleeping time as recorded in their diaries. One hundred and eighty-nine participants took antihypertensive medications and measured BP results were corrected (+15 mmHg for SBP and +10 mmHg for DBP) prior to analysis as recommended by previous studies. NS, non-significant.
a
Data expressed as mean (SD) for normally distributed variable or median (interquartile range) in case of skewed distribution.