Table 2.

Correlations of the Stringency and Duration for 8 interventions with cumulative infections per million population on July 1, 2020.

Interventions	Stringency		Duration
	Correlation coefficient	95% CI	Correlation coefficient	95% CI
Early phase
School closing	−0.14	−0.30 to 0.02	−0.15	−0.31 to 0.01
Workplace closing	−0.05	−0.11 to 0.21	−0.02	−0.18 to 0.15
Public events cancellation	−0.16	−0.31 to 0.00	−0.18	−0.33 to −0.02
Restrictions on gatherings	−0.02	−0.18 to 0.14	−0.10	−0.26 to 0.06
Public transport closing	0.04	−0.13 to 0.20	0.04	−0.13 to 0.20
Stay at home requirements	−0.05	−0.12 to 0.21	−0.01	−0.18 to 0.15
Restrictions on internal movement	−0.03	−0.14 to 0.19	−0.02	−0.14 to 0.18
International travel controls	−0.18	−0.33 to −0.02	−0.23	−0.38 to −0.07
Middle phase
School closing	0.11	−0.07 to 0.27	0.17	0.00-0.34
Workplace closing	0.34	0.17-0.48	0.34	0.18-0.48
Public events cancellation	0.15	−0.02 to 0.31	0.15	−0.02 to 0.32
Restrictions on gatherings	0.34	0.18-0.48	0.22	0.05-0.38
Public transport closing	0.15	−0.02 to 0.32	0.25	0.08-0.41
Stay at home requirements	0.18	0.01-0.34	0.24	0.07-0.39
Restrictions on internal movement	0.26	0.10-0.42	0.33	0.17-0.47
International travel controls	−0.03	−0.20 to 0.15	0.03	−0.15 to 0.20

Note. The correlation coefficients were calculated using Spearman correlation analysis, separately in the early phase and middle phase.

CI indicates confidence interval.