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. 2022 Aug 31;19(17):10850. doi: 10.3390/ijerph191710850

Table 3.

The associated factors of SBS by a multivariable logistic regression model.

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.