Table 1.
Distribution of low back pain prevalence according to study variables.
| Study Variables | Low Back Pain |
Prev. | 95 % CI | Total |
|||||
|---|---|---|---|---|---|---|---|---|---|
| No |
Yes |
p | |||||||
| n | % | n | % | n | % | ||||
| Region | <0.001 | ||||||||
| Taparacá | 191 | 75.7 | 60 | 24.3 | 0.4 | 0.31, 0.61 | 251 | 2.0 | |
| Antofogasta | 403 | 86.3 | 69 | 13.7 | 0.4 | 0.34, 0.53 | 472 | 3.8 | |
| Atacama | 222 | 75.5 | 78 | 24.6 | 0.4 | 0.28, 0.50 | 300 | 2.4 | |
| Coquimbo | 435 | 79.9 | 114 | 20.1 | 0.8 | 0.69, 1.05 | 549 | 4.5 | |
| Valparaiso | 1155 | 81.4 | 282 | 8.0 | 1.2 | 1.72, 2.23 | 1437 | 11.7 | |
| O´higgins | 438 | 77.6 | 142 | 22.4 | 1.16 | 0.96, 1.40 | 580 | 4.7 | |
| Maule | 600 | 86.1 | 120 | 13.9 | 0.8 | 0.65, 1.02 | 720 | 5.9 | |
| Biobio | 1233 | 74.9 | 408 | 25.1 | 3.0 | 2.54, 3.46 | 1641 | 13.4 | |
| La Araucanía | 498 | 72.8 | 190 | 27.2 | 1.5 | 1.29, 1.78 | 688 | 5.6 | |
| Los Lagos | 414 | 81.1 | 107 | 18.9 | 0.9 | 0.75, 1.12 | 521 | 4.2 | |
| Aysen | 227 | 80.7 | 48 | 19.3 | 0.1 | 0.07, 0.15 | 275 | 2.2 | |
| Magallanes y La A.C | 204 | 82.1 | 49 | 17.9 | 0.1 | 0.10, 0.22 | 253 | 2.1 | |
| Metropolitana | 2945 | 76.3 | 901 | 23.7 | 9.7 | 8.73, 10.68 | 3846 | 31.3 | |
| Los Rios | 317 | 78.7 | 97 | 21.3 | 0.4 | 0.34, 0.60 | 414 | 3.4 | |
| Arica y Parinacota | 246 | 77.4 | 72 | 22.6 | 0.2 | 0.15, 0.27 | 318 | 2.6 | |
| Total | 9528 | 77.9 | 2737 | 22.1 | 22.0 | 21.02, 23.13 | 12265 | 100 | |
| Sex | <0.001 | ||||||||
| Male | 4206 | 79.5 | 1101 | 20.5 | 9.9 | 9.09, 10.72 | 5307 | 43.3 | |
| Female | 5322 | 76.4 | 1636 | 23.6 | 12.2 | 11.37, 13.03 | 6958 | 56.7 | |
| Age Group | <0.001 | ||||||||
| 18 to 30 years old | 2297 | 90.0 | 273 | 10.0 | 2.5 | 2.13, 2.91 | 2570 | 20.9 | |
| 30 to 50 years old | 3228 | 77.0 | 934 | 23.0 | 7.7 | 7.00, 8.45 | 4162 | 33.9 | |
| 50 to 65 years old | 2209 | 70.1 | 894 | 29.8 | 7.4 | 6.74, 8.18 | 3103 | 25.3 | |
| >65 years old | 1794 | 73.4 | 636 | 26.5 | 4.4 | 3.97, 4.63 | 2430 | 19.8 | |
| Educational Level | <0.001 | ||||||||
| No Education | 258 | 76.5 | 79 | 23.4 | 0.6 | 0.44, 0.79 | 337 | 2.7 | |
| Incomplete Primary Level | 1379 | 72.3 | 527 | 27.7 | 3.8 | 3.38, 4.28 | 1906 | 15.5 | |
| Complete Primary Level | 1005 | 69.9 | 409 | 30.4 | 3.3 | 2.88, 3.82 | 1414 | 11.5 | |
| Incomplete Secondary Level | 1311 | 75.6 | 449 | 24.4 | 3.4 | 3.05, 3.89 | 1760 | 14.3 | |
| Complete Secondary Level | 2640 | 76.6 | 772 | 23.4 | 6.5 | 5.91, 7.26 | 3412 | 27.8 | |
| Incomplete Higher Education | 1120 | 86.7 | 173 | 13.4 | 1.7 | 1.36, 2.06 | 1293 | 10.5 | |
| Graduated | 1810 | 85.1 | 328 | 14.8 | 2.6 | 2.25, 3.10 | 2138 | 17.5 | |
| Marital Status | <0.001 | ||||||||
| Single | 3168 | 86.5 | 591 | 13.5 | 4.4 | 3.89, 4.91 | 3759 | 30.6 | |
| Married/Stable Union | 4615 | 74.2 | 1490 | 25.8 | 13.7 | 12.90, 14.63 | 6105 | 49.8 | |
| Widower | 881 | 71.6 | 331 | 28.4 | 2.0 | 1.69, 2.36 | 1212 | 9.9 | |
| Separated / Divorced | 864 | 72.6 | 325 | 27.4 | 1.9 | 1.62, 2.28 | 1189 | 9.7 | |
| Working Situation - Worked at least 1 hour in the last week | 0.2350 | ||||||||
| No | 4360 | 78.7 | 1271 | 21.3 | 9.4 | 8.75, 10.17 | 5631 | 45.5 | |
| Yes | 5168 | 77.3 | 1466 | 22.7 | 12.6 | 11.66, 13.63 | 6634 | 54.5 | |
| Income quintiles | <0.001 | ||||||||
| V (larger) | 1818 | 83.9 | 381 | 16.1 | 2.9 | 2.50, 4.93 | 2199 | 17.9 | |
| IV | 1877 | 78.8 | 532 | 21.2 | 4.4 | 3.91, 4.93 | 2409 | 19.6 | |
| III | 1929 | 77.2 | 579 | 22.8 | 4.8 | 4.31, 5.43 | 2508 | 20.4 | |
| II | 1954 | 75.4 | 605 | 24.6 | 5.1 | 4.54, 5.78 | 2559 | 20.9 | |
| I (smaller) | 1950 | 74.8 | 640 | 25.2 | 4.7 | 4.27, 5.30 | 2590 | 21.1 | |
| Type of Housing | 0.0570 | ||||||||
| House | 3772 | 77.9 | 1079 | 22.1 | 8.4 | 7.73, 9.16 | 4851 | 39.5 | |
| “House with wall and roof neighbor on one side” | 2946 | 76.5 | 892 | 23.5 | 7.7 | 6.97, 8.53 | 3838 | 31.3 | |
| “House with wall and roof neighbor on both sides” | 1447 | 79.5 | 384 | 20.5 | 2.9 | 2.48, 3.41 | 1831 | 14.9 | |
| Apartment in a building with elevator | 395 | 84.2 | 77 | 15.8 | 0.8 | 0.59, 1.11 | 472 | 3.8 | |
| Apartment in a building without elevator | 803 | 78.5 | 245 | 21.5 | 1.8 | 1.37, 2.30 | 1048 | 8.5 | |
| Tenement | 29 | 69.2 | 12 | 30.8 | 0.1 | 0.04, 0.27 | 41 | 0.3 | |
| “Emergency housing” | 103 | 69.9 | 38 | 30.1 | 0.2 | 0.13, 0.42 | 141 | 1.1 | |
| “Ranch or Cabin” | 1 | 36.1 | 2 | 63.9 | 0.0 | 0.00, 0.03 | 3 | 0.0 | |
| Precarious accommodation made with reused materials | 10 | 87.8 | 3 | 12.2 | 0.0 | 0.00, 0.06 | 13 | 0.1 | |
| No information | 22 | 74.4 | 5 | 25.6 | 0.0 | 0.01, 0.12 | 27 | 0.2 | |
| Health Rating | <0.001 | ||||||||
| Very good | 1431 | 93.2 | 100 | 6.8 | 0.9 | 0.70, 1.21 | 1531 | 12.5 | |
| Good | 4694 | 84.8 | 842 | 15.2 | 7.0 | 6.37, 7.72 | 5536 | 45.1 | |
| Regular | 2828 | 66.0 | 1383 | 34.0 | 10.9 | 10.18, 11.80 | 4211 | 34.3 | |
| Poor | 476 | 59.7 | 349 | 40.3 | 2.7 | 2.28, 3.12 | 825 | 6.7 | |
| Very poor | 93 | 61.4 | 62 | 38.8 | 0.4 | 0.32, 0.62 | 155 | 1.3 | |
| No information | 6 | 69.7 | 1 | 30.3 | 0.0 | 0.002, 0.12 | 7 | 0.1 | |