Table 3.

Hazard ratios corresponding to Cox proportional hazard models (with covariates) predicting a switch from less to more in-person instruction during July 2020—private not-for-profit institutions divided into tertiles by tuition reliance and selectivity

	Tuition reliance			Selectivity
	Tertile 1 (mean tuition reliance = 29.90)	Tertile 2 (mean tuition reliance = 54.95)	Tertile 3 (mean tuition reliance = 77.46)	Tertile 1 (mean selectivity = 40.48)	Tertile 2 (mean selectivity = 67.48)	Tertile 3 (mean selectivity = 87.63)
Percent non-US (logged)	1.02 (0.15)	1.19 (1.62)	1.26* (2.34)	1.15 (1.11)	1.31* (2.15)	1.18 (1.57)
Covariates?	Yes	Yes	Yes	Yes	Yes	Yes
N observations	11,870	11,804	11,939	10,277	9972	10,144
N subjects	415	415	415	358	357	357
N failures	43	45	40	35	48	39
Log likelihood	− 246.370	− 257.815	− 227.727	− 197.419	− 266.376	− 213.563

Z-statistics are in parentheses

*p < 0.05