Table A6.

Comparison of all face masks including face mask condition and cardiorespiratory fitness (maximum physical working performance of an initial bicycle ergometer test)—linear mixed model 3.

Model	Outcome Parameter	Dependent Variable	Degree of Freedom	F-Value	p-Value
3	PWC130	Face mask condition	3	8.857	<0.0001
		Cardiorespiratory fitness	1	64.454	<0.0001
	SpO2	Face mask condition	3	0.774	0.511
		Cardiorespiratory fitness	1	0.558	0.461
	tcPCO2	Face mask condition	3	2.254	0.087
		Cardiorespiratory fitness	1	9.957	0.003
	Systolic blood presurre	Face mask condition	3	0.133	0.940
		Cardiorespiratory fitness	1	8.930	0.005
	Diastolic blood presurre	Face mask condition	3	0.293	0.830
		Cardiorespiratory fitness	1	0.507	0.481
	Breathing frequency	Face mask condition	3	0.370	0.775
		Cardiorespiratory fitness	1	0.633	0.432
	Perceived respiratory effort	Face mask condition	3	16.912	<0.0001
		Cardiorespiratory fitness	1	35.445	0.235
	Perceived physical exertion	Face mask condition	3	1.116	0.346
		Cardiorespiratory fitness	1	0.630	0.433
3	PWC150	Face mask condition	3	1.419	0.243
		Cardiorespiratory fitness	1	87.273	<0.0001
	SpO2	Face mask condition	3	0.464	0.708
		Cardiorespiratory fitness	1	0.579	0.452
	tcPCO2	Face mask condition	3	4.244	0.009
		Cardiorespiratory fitness	1	0.915	0.347
	Systolic blood presurre	Face mask condition	3	0.801	0.498
		Cardiorespiratory fitness	1	5.041	0.033
	Diastolic blood presurre	Face mask condition	3	0.295	0.829
		Cardiorespiratory fitness	1	0.138	0.713
	Breathing frequency	Face mask condition	3	1.153	0.333
		Cardiorespiratory fitness	1	4.440	0.043
	Perceived respiratory effort	Face mask condition	3	16.348	<0.0001
		Cardiorespiratory fitness	1	2.621	0.115
	Perceived physical exertion at PWC150	Face mask condition	3	1.303	0.279
		Cardiorespiratory fitness	1	2.225	0.145

Bonferroni corrected alpha level is 0.003. Statistically significant results are shaded in grey and written in bold letters.