Indoor Air

Research Article

The Association between Indoor Carbon Dioxide Reduction by Plants and Health Effects

Table 3

Percentage changes of health variables for an interquartile range change of air pollution levels^a in mixed-effects models.


	All data^b	Without plant	With plants

CO₂
Serum CO₂	1.61	4.52	1.32
SBP	1.33	2.41	0.38
DBP	-1.4	1.5	-2.3
Drowsiness	7.62	14.57	3.82
PM_2.5
Serum CO₂	-0.04	1.34	-0.97
SBP	2.56	3.66	1.12
DBP	0.98	-1.45	0.78
Drowsiness	1.98	-0.34	2.99
TVOCs
Serum CO₂	0.61	-0.78	1.01
SBP	1.28	2.41	0.99
DBP	0.35	1.04	1.39
Drowsiness	-1.93	2.11	0.91

^aThe values are presented as percentage changes and 95% confidence intervals for interquartile range changes after adjusting for sex, age, body mass index, temperature, and humidity in 27 mixed-effects models. ^bThe plant (with plants versus without plant) was only adjusted in 9 all data mixed-effects models. value <0.05.