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Table 1 General characteristic of the sample by levels of noise exposure

From: Noise exposure and hypertension: investigation of a silent relationship

Variable ≤75 dB(A) 75 – 85 dB(A) ≥85 dB(A) p-value
  n (%) n (%) n (%)  
  n = 388 n = 871 n = 470  
Age (years)     
  <30 83 (23,2) 186 (52,0) 89 (24,9) 0.03
  30-34 80 (26,1) 145 (47,4) 81 (26,5)  
  35-39 56 (19,2) 158 (54,1) 78 (26,7)  
  40-44 42 (15,4) 147 (53,8) 84 (30,8)  
  45-49 47 (21,8) 107 (49,5) 62 (28,7)  
  ≥50 80 (28,2) 128 (45,1) 76 (26,8)  
Gender     
  Female 82 (56,9) 60 (41,7) 2 (1,4) 0.00
  Male 306 (19,3) 811 (51,2) 468 (29,5)  
Marital status     
  Single 212 (23,1) 485 (52,8) 222 (24,2) 0.01
  Married 176 (21,7) 386 (47,7) 248 (30,6)  
Education     
  Up to incomplete elementary school 11 (13,6) 45 (55,6) 25 (30,9) 0.00
  Complete elementary school 24 (18,0) 62 (46,6) 47 (35,3)  
  Incomplete middle school 40 (11,4) 202 (57,7) 108 (30,9)  
  Complete middle school 45 (14,9) 173 (57,3) 84 (27,8)  
  Incomplete high school 39 (19,3) 96 (47,5) 67 (33,2)  
  Complete high school 157 (29,2) 252 (46,9) 128 (23,8)  
  College/university (complete or not) 72 (58,1) 41 (33,1) 11 (8,9)  
Socioeconomic condition*     
  Lower 71 (16,8) 242 (57,2) 110 (26,0) 0.00
  Higher 317 (24,3) 629 (48,2) 360 (27,6)  
Physical activity     
  No 231 (22,5) 514 (50,1) 281 (27,4) 0.44
  Irregular 66 (19,6) 171 (50,9) 99 (29,5)  
  Regular 91 (24,8) 186 (50,7) 90 (24,5)  
Tobacco use     
  Non-smoker 301 (22,4) 698 (51,9) 347 (25,8) 0.03
  Smoker 87 (22,7) 173 (45,2) 123 (32,1)  
Alcohol consumption     
  No consumption 252 (23,4) 556 (51,6) 270 (25,0) 0.03
  Regular 136 (20,9) 315 (48,4) 200 (30,7)  
Body Mass Index     
  Normal 167 (23,3) 373 (51,9) 178 (24,8) 0.04
  Overweight 148 (19,9) 380 (51,2) 214 (28,8)  
  Obese 73 (27,1) 118 (43,9) 78 (29,0)  
Type of Service     
  Industrial maintenance 169 (27,7) 180 (29,5) 261 (42,8) 0.00
  Civil Works 135 (22,0) 329 (53,5) 151 (24,6)  
  Building cleaning 33 (9,4) 261 (74,1) 58 (16,5)  
  Others 51 (33,6) 101 (66,4) 0 (0)  
Heat     
  Non-exposed 385 (25,2) 769 (50,4) 372 (24,4) 0.00
  Exposed 3 (1,5) 102 (50,2) 98 (48,3)  
Arterial Hypertension     
  Normotensive 312 (24,0) 648 (49,9) 339 (26,1) 0.02
  Hypertensive 76 (17,7) 223 (51,9) 131 (30,5)  
  1. *Socioeconomic condition: Existent - presence of piped water + regular garbage collection + sewage system + electricity; absence: inexistence of at least one of the above factors.