Table 1.
General characteristic of the sample by levels of noise exposure
| 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) |
*Socioeconomic condition: Existent - presence of piped water + regular garbage collection + sewage system + electricity; absence: inexistence of at least one of the above factors.