Table II.
Risk for chronic bronchitis by occupational groups and occupations; ever employment and duration of employment
| Occupational Groups and Occupations | Ever employment | Duration of employment | |||||
|---|---|---|---|---|---|---|---|
| < 10 years | ≥ 10 years | Trend P | |||||
| Cases | OR (95% CI)* | No | OR (95% CI)* | No | OR (95% CI)* | ||
| CONSTRUCTION WORKERS | 48 | 0.97 (0.72–1.30) | 31 | 0.96 (0.66–1.37) | 17 | 1.00 (0.61–1.63) | 0.88 |
| TRANSPORTATION WORKERS | 72 | 0.84 (0.66–1.07) | 28 | 0.70 (0.48–1.02) | 44 | 0.97 (0.71–1.31) | 0.35 |
| TEXTILE WORKERS | 833 | 1.09 (1.00–1.18) | 295 | 1.14 (1.01–1.30) | 538 | 1.06 (0.96–1.17) | 0.11 |
| Spinning/Filature/Plying/Twisting | 245 | 1.28 (1.12–1.47) | 94 | 1.44 (1.16–1.79) | 151 | 1.20 (1.01–1.42) | 0.003 |
| Instal/Maint Mach Weaving/Knitting | 21 | 1.33 (0.85–2.07) | 10 | 1.37 (0.72–2.61) | 11 | 1.29 (0.70–2.39) | 0.25 |
| Textile Printing & Dyeing Workers | 30 | 1.33 (0.92–1.93) | 12 | 1.50 (0.83–2.70) | 18 | 1.24 (0.77–2.00) | 0.20 |
| PAPER WORKERS | 38 | 1.20 (0.87–1.67) | 18 | 1.35 (0.84–2.17) | 20 | 1.09 (0.70–1.71) | 0.40 |
| Paper-Making Workers | 14 | 1.47 (0.86–2.53) | 5 | 1.66 (0.66–4.14) | 9 | 1.39 (0.71–2.72) | 0.21 |
| WOOD WORKERS | 18 | 1.39 (0.87–2.24) | 12 | 1.53 (0.85–2.75) | 6 | 1.18 (0.52–2.68) | 0.27 |
| Other Timber/Finished Prods | 10 | 1.61 (0.85–3.06) | 5 | 1.40 (0.57–3.45) | 5 | 1.90 (0.76–4.74) | 0.11 |
| AGRICULTURE AND FARMERS | 526 | 0.95 (0.85–1.05) | 393 | 0.96 (0.85–1.08) | 133 | 0.91 (0.76–1.09) | 0.24 |
| Tea plantation/Orchard Farmers | 11 | 1.23 (0.67–2.26) | 10 | 1.14 (0.60–2.16) | 1/0 | 96.91 (0.00–∝) | 0.37 |
| Other farm workers | 12 | 1.31 (0.73–2.34) | 6 | 2.16 (0.93–5.02) | 6 | 0.95 (0.42–2.14) | 0.65 |
| Forest Raising/Planting Personnel | 14 | 1.46 (0.83–2.55) | 9 | 1.31 (0.67–2.56) | 5 | 1.94 (0.70–5.41) | 0.14 |
| Animal Husbandry Workers | 5 | 3.19 (1.21– 8.45) | 4 | 3.94 (1.25–12.46) | 1 | 1.92 (0.25–14.60) | 0.04 |
| CHEMICAL & RUBBER WORKERS | 172 | 1.01 (0.86–1.18) | 68 | 0.99 (0.77–1.26) | 104 | 1.02 (0.84–1.25) | 0.87 |
| Rubber Process Machine Operators | 31 | 1.22 (0.85–1.76) | 11 | 1.28 (0.70–2.36) | 20 | 1.19 (0.76–1.87) | 0.33 |
| FOOD PREPARING & PROCESSING | 210 | 1.05 (0.91–1.21) | 84 | 0.88 (0.70–1.09) | 126 | 1.21 (1.00–1.45) | 0.19 |
| Pickling/Canning/Preservation Food | 11 | 1.38 (0.75–2.53) | 2 | 0.81 (0.20–3.28) | 9 | 1.64 (0.83–3.24) | 0.20 |
| METAL WORKERS | 436 | 0.99 (0.89–1.10) | 194 | 1.07 (0.92–1.24) | 242 | 0.93 (0.82–1.07) | 0.55 |
| SERVICE OCCUPATIONS | 839 | 1.05 (0.97–1.14) | 414 | 1.07 (0.97–1.19) | 425 | 1.03 (0.93–1.15) | 0.32 |
| Postal Service Workers | 10 | 1.65 (0.86–3.16) | 5 | 2.06 (0.80–5.28) | 5 | 1.39 (0.56–3.43) | 0.21 |
| Purchasing Agents | 20 | 1.48 (0.94–2.33) | 12 | 1.79 (0.97–3.23) | 8 | 1.19 (0.59–2.42) | 0.19 |
| Service in Theaters and Exhibition Halls | 8 | 3.52 (1.63–7.61) | 4 | 2.73 (0.95–7.82) | 4 | 5.13 (1.58–16.69) | 0.0003 |
| Cleaning/Waste Disposal | 16 | 1.37 (0.81–2.30) | 11 | 2.42 (1.25–4.70) | 5 | 0.73 (0.30–1.79) | 0.70 |
| Other Service Personnel | 22 | 1.34 (0.87–2.07) | 15 | 1.35 (0.80–2.27) | 7 | 1.33 (0.62–2.84) | 0.21 |
| OTHER PRODUCTION WORKERS | 1121 | 1.06 (0.99–1.14) | 441 | 1.05 (0.95–1.17) | 680 | 1.07 (0.98–1.16) | 0.11 |
| Binders | 12 | 1.55 (0.87–2.78) | 3 | 1.90 (0.58–6.18) | 9 | 1.47 (0.75–2.87) | 0.18 |
| Welders | 40 | 1.40 (1.01–1.92) | 15 | 1.23 (0.73–2.08) | 25 | 1.52 (1.01–2.28) | 0.03 |
| Glass Workers | 27 | 1.24 (0.85–1.83) | 12 | 1.26 (0.71–2.25) | 15 | 1.23 (0.73–2.07) | 0.30 |
| Painters | 67 | 1.22 (0.95–1.57) | 33 | 1.22 (0.86–1.73) | 34 | 1.23 (0.87–1.74) | 0.13 |
| Prod Cultural/Educ/Sports Articles | 14 | 1.22 (0.71–2.08) | 10 | 1.54 (0.81–2.92) | 4 | 0.80 (0.30–2.16) | 0.78 |
| Other Power Generation Equipment | 13 | 1.20 (0.69–2.11) | 9 | 1.75 (0.88–3.48) | 4 | 0.71 (0.26–1.93) | 0.92 |
| Workers in Packing/Baling | 121 | 1.39 (1.15–1.68) | 59 | 1.65 (1.26–2.16) | 62 | 1.21 (0.94–1.57) | 0.006 |
| Loading/Unloading Workers | 26 | 0.64 (0.43–0.95) | 14 | 0.79 (0.46–1.34) | 12 | 0.53 (0.30–0.94) | 0.02 |
| HEALTH CARE WORKERS | 254 | 0.97 (0.85–1.10) | 82 | 1.06 (0.85–1.33) | 172 | 0.93 (0.79–1.09) | 0.46 |
| Urban Health Technology Personnel | 31 | 1.23 (0.85–1.76) | 20 | 1.22 (0.78–1.92) | 11 | 1.24 (0.68–2.28) | 0.29 |
| SCIENCE AND TECHNICAL | 298 | 1.15 (1.01–1.30) | 113 | 1.13 (0.93–1.38) | 185 | 1.16 (0.99–1.36) | 0.04 |
| Researchers in Engineering | 17 | 1.42 (0.86–2.34) | 4 | 0.65 (0.24–1.77) | 13 | 2.24 (1.26–4.01) | 0.03 |
| Civil Engineering Tech Personnel | 19 | 1.35 (0.85–2.16) | 5 | 0.79 (0.33–1.94) | 14 | 1.81 (1.04–3.16) | 0.08 |
| Electrical/Electronic Engineering | 40 | 1.21 (0.87–1.67) | 20 | 1.37 (0.87–2.18) | 20 | 1.08 (0.69–1.69) | 0.40 |
| Mechanical Engineering Personnel | 41 | 1.29 (0.93–1.78) | 14 | 1.74 (0.99–3.04) | 27 | 1.14 (0.77–1.68) | 0.25 |
| Industry Management Tech Personnel | 33 | 1.21 (0.85–1.73) | 16 | 1.28 (0.77–2.13) | 17 | 1.15 (0.71–1.88) | 0.36 |
| TEACHING PERSONNEL | 475 | 1.13 (1.02–1.26) | 184 | 1.24 (1.06–1.45) | 291 | 1.06 (0.93–1.21) | 0.11 |
| Other Teachers | 45 | 1.30 (0.96–1.76) | 29 | 1.35 (0.92–1.97) | 16 | 1.22 (0.74–2.03) | 0.14 |
| ADMIN & POLIT & ART & LITER | 966 | 1.03 (0.96–1.12) | 364 | 1.04 (0.93–1.17) | 602 | 1.03 (0.93–1.13) | 0.50 |
| Personnel Workers | 38 | 1.33 (0.96–1.85) | 24 | 1.61 (1.06–2.45) | 14 | 1.03 (0.60–1.76) | 0.25 |
| Performers | 30 | 1.83 (1.25–2.67) | 13 | 2.60 (1.43–4.73) | 17 | 1.50 (0.91–2.46) | 0.01 |
| Editors | 19 | 1.89 (1.17–3.04) | 9 | 1.90 (0.95–3.79) | 10 | 1.88 (0.98–3.61) | 0.01 |
| Typist, Mimeographers | 31 | 1.72 (1.19–2.49) | 20 | 2.13 (1.33–3.40) | 11 | 1.29 (0.70–2.37) | 0.03 |
| Armymen | 22 | 1.22 (0.79–1.89) | 16 | 1.10 (0.66–1.83) | 6 | 1.72 (0.74–4.02) | 0.25 |
| Political Workers | 75 | 1.22 (0.96–1.55) | 42 | 1.18 (0.86–1.62) | 33 | 1.28 (0.90–1.84) | 0.09 |
| Other Political & Security Workers | 21 | 1.25 (0.80–1.94) | 8 | 0.93 (0.46–1.89) | 13 | 1.58 (0.89–2.78) | 0.18 |
*
Adjusted for smoking, education, family income, and asthma