Table 4.
Crude and adjusted odds ratio and 95% confidence intervals (in parentheses) for sick building syndrome symptom associated with per 100 ppm increase in difference between indoor and outdoor carbon dioxide concentrations (dCO2) obtained from generalized estimating equations logistic regression models (n = 417).
| Sick-Building Syndrome Symptom | dCO2 (per 100 ppm) | ||
|---|---|---|---|
| Crude | Adjusted a | Adjusted b | |
| Eye, any | 0.99 (0.97–1.01) | 1.00 (0.96–1.04) | 1.00 (0.96–1.04) |
| Eye dryness | 1.01 (0.99–1.04) | 1.02 (0.99–1.06) | 1.02 (0.98–1.06) |
| Eye irritation | 0.85 (0.73–0.99) | 0.81 (0.67–0.98) | 0.74 (0.59–0.93) |
| Upper respiratory, any | 1.02 (0.91–1.14) | 1.04 (0.93–1.17) | 0.97 (0.89–1.06) |
| Nose itching | 1.02 (0.86–1.21) | 1.03 (0.80–1.32) | 1.03 (0.80–1.32) |
| Runny nose | 0.97 (0.79–1.20) | 0.92 (0.71–1.18) | 0.92 (0.72–1.19) |
| Stuffy nose | 1.03 (0.94–1.13) | 1.11 (0.96–1.28) | 1.07 (0.92–1.25) |
| Sneezing | 1.04 (0.94–1.15) | 0.93 (0.69–1.25) | 0.52 (0.12–2.31) |
| Dry throat | 1.03 (0.89–1.18) | 1.10 (1.00–1.22) | 1.03 (0.91–1.15) |
| Lower respiratory, any | 0.99 (0.94–1.18) | 1.07 (0.96–1.20) | 1.05 (0.94–1.18) |
| Difficulties in breathing | 0.99 (0.94–1.18) | 1.07 (0.96–1.20) | 1.05 (0.94–1.18) |
| Skin, any | 1.03 (0.87–1.22) | 1.04 (0.85–1.28) | 1.05 (0.82–1.34) |
| Dryness | 1.03 (0.87–1.22) | 1.04 (0.85–1.28) | 1.05 (0.82–1.34) |
| Non-specific, any | 1.04 (0.97–1.11) | 1.16 (1.04–1.29) | 1.13 (1.02–1.26) |
| Tiredness | 1.03 (0.97–1.10) | 1.16 (1.07–1.26) | 1.14 (1.06–1.23) |
| Difficulties in concentrating | 1.01 (0.93–1.09) | 1.09 (0.99–1.20) | 1.08 (0.98–1.19) |
| Irritability | 0.97 (0.89–1.05) | 1.13 (0.95–1.35) | 1.09 (0.92–1.29) |
| Dizziness | 1.10 (0.97–1.26) | 1.22 (1.08–1.37) | 1.20 (1.07–1.34) |
a Adjusted for gender, age, smoking status, presence of carpet in workspace, new furniture, new decoration, painting recently in workspace, leaking, speck of molds, allergies, chemical and environmental tobacco smoking sensitivity, asthma, nasosinusitis, atopic rhinitis, migraine, working stress, lacking of family support, sanitizing by using chemical, exposure to environmental tobacco smoking, working time per week, working time per day, relative humidity and room temperature. b Indoor total volatile organic compounds concentrations (TVOCs) were included in the model.