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Table 1 Main characteristics of the study participants recruited

From: Association of socioeconomic status with hypertension prevalence and control in Nanjing: a cross-sectional study

Characteristics Overall Male Female P value
N = 60,283 N = 29,848 N = 30,435
age, mean (SD) 43.7 (16.4) 43.4 (16.7) 44.0 (16.1)  < 0.001
Systolic blood pressure (mmHg), mean (SD) 123.5 (18.9) 125.7 (17.4) 121.3 (20.1)  < 0.001
Diastolic blood pressure (mmHg), mean (SD) 77.3 (14.0) 78.8 (14.0) 75.9 (13.8)  < 0.001
Hypertension prevalence, n (%) 15,686 (26.0) 8579 (28.7) 7107 (23.4)  < 0.001
Hypertension control rate, n (%)a 5797 (61.1) 3032(59.4) 2765 (63.2)  < 0.001
Marriage, n (%)
 Single 10,556 (17.5) 6043 (20.2) 4513 (14.8)  < 0.001
 Married or living with a partner 47,536 (78.9) 23,039 (77.2) 24,497 (80.5)
 Separated, divorced or widowed 2191 (3.6) 766 (2.6) 1425 (4.7)
Education, n (%)
 College 27,805 (46.1) 14,626 (49.0) 13,179 (43.3)  < 0.001
 Junior/Senior 27,020 (44.8) 13,434 (45.0) 13,586 (44.6)
 Primary 5458 (9.1) 1788 (6.0) 3670 (12.1)
Occupation, n (%)
 Unemployed and retired people 16,516 (27.4) 5841 (19.6) 10,675 (35.1)  < 0.001
 Mental laborers/Students 23,241 (38.6) 12,853 (43.1) 10,388 (34.1)
 Service staff 7192 (11.9) 3489 (11.7) 3703 (12.2)
 Manual laborers 13,334 (22.1) 7665 (25.7) 5669 (18.6)
Annual household income,tertiles range(¥)b
 Higher (≥ 108,000) 4586 (34.3) 2212 (35.7) 2374 (33.2)  < 0.001
 Middle (≤ 60,000 < 108,000) 5411 (40.5) 2560 (41.3) 2851 (39.9)
 Lower (< 60,000) 3358 (25.1) 1430 (23.1) 1928 (27.0)
Smoking, n (%)
 Nonsmoker 46,861 (77.7) 16,878 (56.5) 29,983 (98.5)  < 0.001
 Smoker 13,422 (22.3) 12,970 (43.5) 452 (1.5)
Alcohol drinking, n (%)
 Non drinker 42,631 (70.7) 15,616 (52.3) 27,015 (88.8)  < 0.001
 Drinker 17,652 (29.3) 14,232 (47.7) 3420 (11.2)
Family history, n (%)
 No 32,565 (61.9) 16,312 (63.3) 16,253 (60.6)  < 0.001
 Yes 20,011 (38.1) 9462 (36.7) 10,549 (39.4)
Salt intake, n (%)
 Lower (< 6 g) 10,546 (17.5) 5081 (17.0) 5465 (18.0) 0.003
 Higher (≥ 6 g) 49,737 (82.5) 24,767 (83.0) 24,767 (83.0)
Physical activity, n (%)
 Sufficient 49,548 (82.2) 24,238 (81.2) 25,310 (83.2)  < 0.001
 Insufficient 10,735 (17.8) 5610 (18.8) 5125 (16.8)
BMI(kg/m2), n (%)
 Underweight 2551 (4.2) 786 (2.6) 1765 (5.8)  < 0.001
 Normal 31,810 (52.8) 13,811 (46.3) 17,999 (59.1)
 Overweight/obese 25,922 (43.0) 15,251 (51.1) 10,671 (35.1)
Dyslipidemia, n (%)
 No 43,190 (71.6) 20,663 (69.2) 22,527 (74.0)  < 0.001
 Yes 17,093 (28.4) 9185 (30.8) 7908 (26.0)
  1. aThe controlled hypertension was defined by systolic BP < 140 mmHg and diastolic BP < 90 mmHg among the subjects that self-reported exhibiting hypertensive and taking antihypertensive medications
  2. bAnnual household income was collected from 13,355 subjects providing verified information about their family's income(male 6202, female 7153)