TABLE 2

Linear regression coefficients for instructor questionnaire domains, with time as the independent variable

Dependent variable	Independent variable	Unstandardised coefficients		Standardised coefficient	Significance
		β	Standard error	β
Trouble sleeping	Constant	0.881	0.113		0.000
	Time	−0.065	0.022	−0.160	0.004
Stomach ache	Constant	0.786	0.114		0.000
	Time	−0.051	0.023	−0.126	0.025
Daytime cough	Constant	1.317	0.104		0.000
	Time	−0.060	0.021	−0.161	0.004
Wake with cough	Constant	0.638	0.096		0.000
	Time	−0.055	0.019	−0.160	0.004
Trouble breathing	Constant	0.843	0.098		0.000
	Time	−0.062	0.019	−0.174	0.002