Table 3.
Variables | Nasal Symptoms Model |
p-Value | Throat Symptoms Model |
p-Value | Lower Respiratory Tract Symptoms Model |
p-Value | Dermal Symptoms Model |
p-Value |
---|---|---|---|---|---|---|---|---|
aOR (95% CI) | aOR (95% CI) | aOR (95% CI) | aOR (95% CI) | |||||
Characteristics | ||||||||
Age (years) | 0.98 (0.94 to 1.03) | 0.401 | 1.03 (0.98 to 1.08) | 0.240 | 1.00 (0.94 to 1.06) | 0.930 | 1.00 (0.95 to 1.04) | 0.846 |
Gender | ||||||||
Male | Ref. | Ref. | Ref. | Ref. | ||||
Female | 2.38 (1.10 to 5.14) | 0.028 | 1.14 (0.50 to 2.64) | 0.746 | 1.22 (0.42 to 3.59) | 0.715 | 1.81 (0.83 to 3.98) | 0.134 |
Working year | 1.00 (0.96 to 1.05) | 0.866 | 0.97 (0.92 to 1.02) | 0.184 | 0.97 (0.91 to 1.04) | 0.383 | 0.99 (0.94 to 1.03) | 0.672 |
Smoking | ||||||||
Non-smokers | Ref. | Ref. | Ref. | Ref. | ||||
Current/Ex-smokers | 0.98 (0.43 to 6.76) | 0.987 | 0.78 (0.08 to 7.44) | 0.832 | 1.32 (0.23 to 7.69) | 0.753 | 0.61 (0.06 to 5.78) | 0.669 |
Underlying disease | ||||||||
Allergic rhinitis | 2.59 (1.00 to 6.68) | 0.050 | 2.88 (1.06 to 7.85) | 0.038 | 5.03 (1.65 to 15.38) | 0.005 | Not included | |
Skin diseases | Not included | Not included | Not included | 6.66 (0.93 to 47.60) | 0.059 | |||
Workers’ perception of working environments | ||||||||
Feeling sensitive to smoke | 0.93 (0.24 to 3.60) | 0.920 | 1.20 (0.28 to 5.23) | 0.804 | 0.48 (0.10 to 2.43) | 0.376 | 0.76 (0.21 to 2.81) | 0.686 |
Feeling sensitive to chemical agents | 1.91 (0.83 to 4.43) | 0.134 | 0.89 (0.36 to 2.23) | 0.808 | 1.52 (0.47 to 4.93) | 0.485 | 1.21 (0.52 to 2.78) | 0.660 |
Working conditions | ||||||||
Regular working hours per week | 1.08 (1.02 to 1.16) | 0.013 | 1.04 (0.98 to 1.10) | 0.227 | 1.12 (1.03 to 1.22) | 0.008 | 1.05 (0.99 to 1.10) | 0.130 |
Overtime working > 2 h per week | 0.95 (0.88 to 1.02) | 0.174 | 1.01 (0.95 to 1.07) | 0.798 | 0.94 (0.83 to 1.06) | 0.266 | 0.93 (0.85 to 1.03) | 0.168 |
Room sizes (m3), increasing 100 m3 | 1.14 (0.99 to 1.32) | 0.067 | 1.11 (0.95 to 1.30) | 0.173 | 1.07 (0.89 to 1.29) | 0.456 | 1.01 (0.88 to 1.16) | 0.867 |
Thermal comfort parameters | ||||||||
Air temperature (°C), increasing 1 °C | 2.63 (1.41 to 4.90) | 0.002 | 1.86 (0.91 to 3.83) | 0.088 | 1.87 (0.82 to 4.29) | 0.139 | 1.32 (0.72 to 2.40) | 0.371 |
Relative humidity (%), increasing 1% | 0.88 (0.80 to 0.97) | 0.007 | 0.87 (0.78 to 0.96) | 0.006 | 0.98 (0.87 to 1.10) | 0.754 | 0.94 (0.86 to 1.02) | 0.144 |
Chemical parameters | ||||||||
Carbon dioxide(ppm), increasing 100 ppm | 1.36 (1.03 to 1.78) | 0.027 | 1.16 (0.84 to 1.60) | 0.353 | 1.26 (0.89 to 1.80) | 0.198 | 1.22 (0.93 to 1.61) | 0.158 |
Formaldehyde (ppm) Q1, <0.28 |
Ref. | Ref. | Ref. | Ref. | ||||
Q2, 0.28 to 0.35 | 0.90 (0.16 to 2.83) | 0.853 | 0.32 (0.08 to 1.39) | 0.128 | 1.19 (0.25 to 5.71) | 0.824 | 0.68 (0.21 to 2.18) | 0.521 |
Q3, 0.36 to 0.73 | 3.88 (1.38 to 11.09) | 0.010 | 1.44 (0.40 to 5.18) | 0.577 | 1.71 (0.40 to 7.30) | 0.472 | 1.45 (0.52 to 4.03) | 0.478 |
Q4, ≥0.74 | 5.24 (1.20 to 23.07) | 0.029 | 6.45 (1.07 to 39.01) | 0.042 | 1.31 (0.19 to 8.95) | 0.783 | 1.89 (0.46 to 7.76) | 0.376 |
PM2.5 ≥ 50 µg/m3 | 0.88 (0.16 to 4.73) | 0.877 | 0.43 (0.06 to 2.90) | 0.384 | 1.98(0.25 to 16.10) | 0.524 | 0.63 (0.10 to 4.00) | 0.621 |
Biological parameters | ||||||||
Total viable bacterial count (CFU/m3), increasing 10 CFU/m3 | 1.31 (1.03 to 1.68) | 0.030 | 1.23 (0.89 to 1.69) | 0.204 | 0.96 (0.70 to 1.30) | 0.784 | 1.12 (0.88 to 1.43) | 0.346 |
Bold aOR and p-value indicate a statistically significant association by p-value ≤ 0.050. Abbreviation: aOR, adjusted odds ratio; CFU/m3, colony-forming units per cubic meter; ppb, parts per billion; ppm, parts per million; Ref., reference category for multinomial variables; Q, quartile.