表 1.

研究期间研究对象所处室内环境污染物监测结果

The monitoring results of indoor environmental pollutants of the study subjects during the research period

Indicator	First visit	Second visit	All
Data are expressed as median (interquartile range). TVOC, total volatile organic compounds; PM2.5, fine particulate matter; CO2, carbon dioxide.
TVOC/(×10-2 mg/m3)	7.8 (10.1)	6.9 (4.4)	6.9 (4.6)
Noise/dB(A)	52.8 (7.1)	52.7 (5.2)	52.7 (5.8)
PM2.5/(μg/m3)	16.0 (25.9)	4.24 (10.8)	10.3 (21.5)
CO2/%	0.1 (0.1)	0.1 (0.1)	0.1 (0.1)
Temperature/℃	25.0 (2.2)	23.9 (2.7)	24.3 (2.7)
Relative humidity/%	38.2 (11.5)	39.1 (17.1)	38.5 (15.0)