Associations of Cognitive Function Scores with Carbon Dioxide, Ventilation, and Volatile Organic Compound Exposures in Office Workers: A Controlled Exposure Study of Green and Conventional Office Environments

http://dx.doi.org/10.1289/ehp.1510037



Table 5. Generalized additive mixed effect models testing the effect of IEQ condition and on cognitive scores, normalized to the “Conventional” condition, treating participant as a random intercept.
Condition Cognitive domain: estimate, [95% confidence interval], (p-value)
Basic Activity Level Applied Activity Level Focused Activity Level Task Orientation Crisis Response Information Seeking Information Usage Breadth of Approach Strategy Average
IEQ, indoor environmental quality.
Day 1
Green+
1.35
[1.28, 1.43]
(< 0.0001)
1.39
[1.26, 1.52]
(< 0.0001)
1.44
[1.27, 1.62]
(< 0.0001)
1.14
[1.11, 1.17]
(< 0.0001)
2.35
[1.91, 2.78]
(< 0.0001)
1.10
[1.07, 1.14]
(< 0.0001)
3.94
[3.47, 4.41]
(< 0.0001)
1.43
[1.25, 1.60]
(< 0.0001)
3.77
[3.40, 4.14]
(< 0.0001)
1.99
[1.89, 2.09]
(< 0.0001)
Day 2
Moderate CO2
1.20
[1.13, 1.27]
(< 0.0001)
1.08
[0.95, 1.21]
(0.23)
1.68
[1.51, 1.85]
(< 0.0001)
1.05
[1.02, 1.08]
(0.0009)
2.05
[1.63, 2.48]
(< 0.0001)
1.11
[1.08, 1.15]
(< 0.0001)
2.61
[2.15, 3.07]
(< 0.0001)
1.29
[1.12, 1.46]
(0.0013)
3.17
[2.81, 3.53]
(< 0.0001)
1.69
[1.59, 1.79]
(< 0.0001)
Day 3
High CO2
0.91
[0.84, 0.98]
(0.015)
0.88
[0.75, 1.01]
(0.081)
0.85
[0.68, 1.02]
(0.087)
1.00
[0.97, 1.03]
(0.76)
1.33
[0.90, 1.75]
(0.14)
1.08
[1.05, 1.12]
(< 0.0001)
1.01
[0.55, 1.48]
(0.95)
0.98
[0.81, 1.15]
(0.78)
0.83
[0.47, 1.19]
(0.36)
0.99
[0.89, 1.09]
(0.78)
Day 4
Green
1.14
[1.06, 1.21]
(0.0003)
1.04
[0.91, 1.18]
(0.51)
1.51
[1.34, 1.68]
(< 0.0001)
1.03
[1.00, 1.06]
(0.065)
1.97
[1.54, 2.40]
(< 0.0001)
1.09
[1.05, 1.12]
(< 0.0001)
2.72
[2.26, 3.19]
(< 0.0001)
1.21
[1.04, 1.38]
(0.018)
2.83
[2.46, 3.19]
(< 0.0001)
1.61
[1.51, 1.71]
(< 0.0001)
Day 5 Conventional (Reference) 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00
Day 6
Green+
1.37
[1.30, 1.44]
(< 0.0001)
1.33
[1.20, 1.46]
(< 0.0001)
1.52
[1.35, 1.69]
(< 0.0001)
1.15
[1.12, 1.19]
(< 0.0001)
2.27
[1.85, 2.69]
(< 0.0001)
1.11
[1.08, 1.15]
(< 0.0001)
4.04
[3.58, 4.51]
(< 0.0001)
1.50
[1.33, 1.67]
(< 0.0001)
3.98
[3.62, 4.34]
(< 0.0001)
2.03
[1.93, 2.13]
(< 0.0001)
R2 0.34 0.17 0.33 0.03 0.28 0.06 0.69 0.27 0.79 0.81