Table 8.

Change in physiological endpoints by exposure

Site Comparison	Physiological endpoint
	Systolic BP (mmHg) Change (95% CI)	Diastolic (mmHg) Change (95% CI)	Heart Rate (bpm) Change (95% CI)
Bayview “with” mask vs College site	−0.7439 (− 3.4666, 1.9789)	−0.5652 (− 2.7252, 1.5947)	3.5312 (1.1294, 5.9330)*
Bayview “with” mask vs Bayview “without” mask	−1.2172 (− 3.8714, 1.4370)	− 0.6673 (− 2.7715, 1.4368)	2.3532 (0.0150, 4.6913)*
College site vs Bayview “without” mask	− 0.4733 (− 3.1738, 2.2272)	−0.1021 (− 2.2438, 2.0396)	− 1.1780 (− 3.5589, 1.2029)*

*p < 0.05

Covariates: Carry over, age, sex and BMI, sequential order of treatments