Table 3.

Predicting contact tracing

	Contact tracing
Variables	Odds Ratio (S.E.)	95% CI	P-value
(Intercept)	0.001 (0.002)		.03
Release date	1.524 (0.404)	0.906, 2.563	.11
Population (log)	0.725 (0.220)	0.400, 1.316	.29
GDP (log)	1.477 (0.413)	0.854, 2.553	.16
Internet user	1.011 (0.015)	0.891, 1.041	.48
Country-level factors
Number of cases (log)	0.831 (0.082)	0.685, 1.008	.06
Political system (Democratic=1)	3.650 (2.013)	1.238, 10.758	.02
App-level factors
Developer (Government=1)	7.987 (2.711)	4.106, 15.534	<.001
Log likelihood	-141.822
Pseudo R2	17.45
N	251