Based on 3315 participants in buildings with full/partial assessment
| | |
Air velocity | 0.05–0.15 m/s | 9/20 | −0.03 (0.13) | p = 0.8 |
CO2 | ⩽500 ppm | 25/4 | −0.22 (0.16) | p = 0.2 |
Lighting level | 250–1000lux | 29/0 | All within limits | |
Radiant temperature | 19–22°C | 8/21 | −0.02 (0.13) | p = 0.9 |
Dry bulb temperature | 19–24°C | 23/6 | 0.16 (0.15) | p = 0.3 |
Relative humidity | 35–65% | 22/7 | 0.09 (0.14) | p = 0.5 |
Noise level | ⩽55Dba | 26/3 | −0.24 (0.18) | p = 0.2 |
Based on 2523 participants in fully assessed buildings
| | |
Airborne fungi | ⩽500 cfu/m3 | 13/5 | −0.10 (0.14) | p = 0.5 |
Airborne bacteria | ⩽1000 cfu/m3 | 12/6 | 0.09 (0.14) | p = 0.5 |
Inhalable dust | ⩽0.10 mg/m3 | 12/6 | 0.08 (0.14) | p = 0.6 |
Volatile organic compounds | ⩽0.3 mg/m3 | 10/8 | −0.10 (0.13) | p = 0.4 |
Exposure based on questionnaire data
|
Acceptable limits
|
Number of participants
|
Mean (SE) symptom score for participants in each category*
| |
Control over workstation | 0 (no control) | 116 | 2.67 (0.19) | p = 0.1 |
| 1 | 328 | 2.30 (0.12) | |
| 2 | 955 | 2.30 (0.07) | |
| 3 | 1103 | 2.20 (0.06) | |
| 4 (most control) | 1550 | 2.34 (0.05) | |