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Table 1 Characteristics of the subjects according to BP status

From: Prevalence and risk factors associated with hypertension and prehypertension in a working population at high altitude in China: a cross-sectional study

Characteristics NTN (n = 1274) PHT (n = 1744) HTN (n = 1180) p-value
Men (%) 725 (56.9) 1324 (75.9)a 977 (82.8)a,b <0.001
Age (years) 37.42 (8.85) 40.20 (8.83)a 44.19 (7.84)a,b < 0.001
Ethnicity (%)
 Han 1116 (87.6) 1579 (90.5)a 1099 (93.1)a,b < 0.001
 Other 158 (12.4) 165 (9.5)a 81 (6.9)a,b < 0.001
Education (%)
 High school/less 218 (17.1) 394 (22.6)a 378 (32.0)a,b < 0.001
 Diploma/Basic degree 1015 (79.7) 1325 (76.0)a 786 (66.6)a,b < 0.001
 Higher degree 41 (3.2) 25 (1.4)a 16 (1.4)a < 0.001
Job position (%)
 Supervisor 59 (4.6) 170 (9.8)a 223 (18.9)a,b < 0.001
 General staff 1215 (95.4) 1574 (90.2)a 957 (81.1)a,b < 0.001
SBP (mmHg) 103.01 (7.01) 117.98 (8.28)a 131.82 (16.75)a,b < 0.001
DBP (mmHg) 69.82 (4.79) 81.60 (3.81)a 94.25 (8.29)a,b < 0.001
BMI (kg/m2) 21.94 (2.91) 23.54 (3.10)a 24.24 (3.26)a,b < 0.001
TC (mmol/L) 4.19 (3.67, 4.81) 4.37 (3.79, 5.00)a 4.47 (3.90, 5.00)a,b < 0.001
TG (mmol/L) 1.15 (0.83, 1.65) 1.37 (0.96, 2.09)a 1.60 (1.03, 2.23)a,b < 0.001
FBG (mmol/L) 4.65 (0.80) 4.87 (1.17)a 5.00 (1.15)a,b < 0.001
SUA (μmmol/L) 334.31 (86.23) 360.93 (84.57)a 378.76 (97.95)a,b < 0.001
Overweight or Obesity (%) 283 (22.2) 748 (42.9)a 612 (51.9)a,b < 0.001
High TC (%) 29 (2.3) 47 (2.7) 44 (3.7) 0.084
High TG (%) 153 (12.0) 352 (20.2)a 279 (23.6)a < 0.001
Current smoking (%) 440 (34.5) 776 (44.5)a 612 (51.9)a,b < 0.001
Frequent drinking (%) 70 (5.5) 170 (9.8)a 188 (15.9)a,b < 0.001
Family history of HTN (%) 408 (32.0) 609 (34.9) 477 (40.4)a,b < 0.001
Diabetes (%) 32 (2.5) 87 (5.0)a 109 (9.2)a,b < 0.001
Hyperuricemia (%) 248 (19.5) 439 (25.2)a 407 (34.5)a,b < 0.001
  1. Data are presented as number (%), mean (SD) or median (range). For the multiple comparisons, Bonferroni adjustment, SNK test and Wilcoxon rank-sum test were used following the Chi-squared test, one-way ANOVA and Kruskal-Wallis test, respectively
  2. Abbreviations: NTN normotension, PHT prehypertension, HTN hypertension, BMI body mass index, SBP systolic blood pressure, DBP diastolic blood pressure, SUA serum uric acid, FBG fasting blood glucose, TC total cholesterol, TG triglycerides
  3. aAn significant difference when compared to NTN
  4. bAn significant difference when compared to PHT