Table 2 Baseline characteristics of followed-up (FU) and lost to follow-up (LFU) workers according to work task in two cement factories in Ethiopia
Cleaners (Cl) | Production workers (Pw) | Controls (C) | Significance level (FU) | ||||||
|---|---|---|---|---|---|---|---|---|---|
Variables | FU (n = 38) | LFU (n = 18) | FU (33) | LFU (11) | FU (20) | LFU (7) | Cl vs C | Cl vs Pw | Pw vs C |
Age (years) a | 32 (10) | 38 (9)* | 36(10) | 41(8) | 39(10) | 47(13) | 0.022 | 0.109 | 0.320 c |
Height (m) a | 1.71(0.066) | 1.72(0.069) | 1.69(0.055) | 1.69(0.046) | 1.69(0.06) | 1.72(0.08) | 0.503 | 0.293 | 0.840 c |
Weight (kg) a | 61.8(8) | 65.2(10.2) | 64.3 (10.3) | 60.2(7.9) | 61.2(9) | 62.7(9.8) | 0.798 | 0.253 | 0.270 c |
Employment (years) a | 9(6.1) | 13(7.6)* | 11(7.3) | 14(8) | 6.7(7) | 12.7(8.9) | 0.237 | 0.157 | 0.035 c |
Current smokers b | 2(5.3) | 0(0) | 1(3) | 0(0) | 0(0) | 0(0) | 0.296 | 0.641 | 0.432 d |
Non smokers b | 36(94.7) | 18(100) | 35(97.2) | 11(100) | 20(100) | 7(100) | 0.703 | 0.510 | 0.678 d |
Ex-smokers b | 2(5.3) | 0(0) | 5(15.2) | 4(36.4) | 1(5) | 0(0) | 0.966 | 0.238 | 0.258 d |
Primary education only b | 12(31.6) | 12(66.7)* | 9(27.3) | 4(36.4) | 5(25) | 4(57.1) | 0.601 | 0.692 | 0.856 d |
Protective device b | 7(18.4) | 0(0) | 8(24.2) | 0(0) | 0(0) | 0(0) | 0.041 | 0.549 | 0.017 d |