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Table 1 The demographic characteristics of different age groups

From: Distribution of risk factors of hypertension patients in different age groups in Tianjin

Index Number
(n = 33,997, %)
Age group t /χ2value P value
Youth (n = 3008) Middle-aged (n = 24,323, %) Elderly (n = 6666, %)
Age (years, mean ± SD) 55.69 ± 10.14 37.82 ± 1.57 54.14 ± 6.90 69.45 ± 2.73 21,284.87 < 0.001*
Gender
 female 20,907 (61.50) 1873 (62.27) 15,335 (63.05) 3699 (55.49) 127.00 < 0.001*
 male 13,090 (38.50) 1135 (37.73) 8988 (36.95) 2967 (44.51)
Nationality
 minority 1326 (3.90) 126 (4.19) 991 (4.07) 209 (3.14) 13.04 0.002*
 han 32,671 (96.10) 2882 (95.81) 23,332 (95.93) 6457 (96.86)
Residence
 countryside 8931 (26.27) 747 (24.83) 6663 (27.39) 1521 (22.82) 60.09 < 0.001*
 town 25,066 (73.73) 2261 (75.17) 17,660 (72.61) 5145 (77.18)
Marital status
 unmarried 2812 (8.27) 179 (5.95) 1655 (6.80) 978 (14.67) 450.23 < 0.001*
 married 31,185 (91.73) 2829 (94.05) 22,668 (93.20) 5688 (85.33)
Education
 primary 6743 (19.83) 163 (5.42) 3883 (15.96) 2697 (40.46) 3773.62 < 0.001*
 secondary 23,008 (67.68) 1776 (59.04) 17,833 (73.32) 3399 (50.99)
 high 4246 (12.49) 1069 (35.54) 2607 (10.72) 570 (8.55)
Family annual income (RMB:yuan)
  < 10,000 3009 (8.85) 155 (5.15) 2229 (9.16) 625 (9.38) 321.55 < 0.001*
 10,000 ~ 50,000 21,157 (62.23) 1569 (52.16) 15,370 (63.19) 4218 (63.28)
  > 50,000 9831 (28.92) 1284 (42.69) 6724 (27.64) 1823 (27.35)
Smoking
 no 26,100 (76.77) 2443 (81.22) 18,615 (76.53) 5042 (75.64) 38.92 < 0.001*
 yes 7897 (23.23) 565 (18.78) 5708 (23.47) 1624 (24.36)
Drinking
 no 24,906 (73.26) 2248 (74.73) 17,547 (72.14) 5111 (76.67) 58.50 < 0.001*
 yes 9091 (26.74) 760 (25.27) 6776 (27.86) 1555 (23.33)
Obesity
 no 24,280 (71.42) 2378 (79.06) 17,400 (71.54) 4502 (67.54) 135.32 < 0.001*
 yes 9717 (28.58) 630 (20.94) 6923 (28.46) 2164 (32.46)
abdominal obesity
 no 8185 (24.08) 1344 (44.68) 5866 (24.12) 975 (14.63) 1024.30 < 0.001*
 yes 25,812 (75.92) 1664 (55.32) 18,457 (75.88) 5691 (85.37)
Hypertension
 no 15,730 (46.27) 2447 (81.35) 11,724 (48.20) 1559 (23.39) 2929.41 < 0.001*
 yes 18,267 (53.73) 561 (18.65) 12,599 (51.80) 5107 (76.61)
Diabetes
 no 27,357 (80.47) 2829 (94.05) 19,799 (81.40) 4729 (70.94) 249.65 < 0.001*
 yes 6640 (19.53) 179 (5.95) 4524 (18.60) 1937 (29.06)
Cardiovascular disease
 no 33,006 (97.09) 3002 (99.80) 23,783 (97.78) 6221 (93.32) 453.01 < 0.001*
 yes 991 (2.91) 6 (0.20) 540 (2.22) 445 (6.68)
Stroke
 no 32,612 (95.93) 3001 (99.77) 23,513 (96.67) 6098 (91.48) 485.32 < 0.001*
 yes 1385 (4.07) 7 (0.23) 810 (3.33) 568 (8.52)
Family history of cardiovascular diseases
 no 32,395 (95.29) 2900 (96.41) 23,106 (95.00) 6389 (95.84) 17.63 < 0.001*
 yes 1602 (4.71) 108 (3.59) 1217 (5.00) 277 (4.16)
Family history of stroke
 no 31,832 (93.63) 2866 (95.28) 22,648 (93.11) 6318 (94.78) 39.38 < 0.001*
 yes 2165 (6.37) 142 (4.72) 1675 (6.89) 348 (5.22)
Hypercholesterolemia
 no 19,580 (57.59) 2304 (76.60) 13,788 (56.69) 3488 (52.33) 528.65 < 0.001*
 yes 14,417 (42.41) 704 (23.40) 10,535 (43.31) 3178 (47.67)   
Hypertriglyceridemia
 no 20,708 (60.91) 2077 (69.05) 14,634 (60.17) 3997 (59.96) 91.88 < 0.001*
 yes 13,289 (39.09) 931 (30.95) 9689 (39.83) 2669 (40.04)   
  1. Note: * indicated P < 0.05