Table 1.

Comparisons of the ILI rates in South and North China before and after the implementation of NPIs during the COVID-19 pandemic

Time series data	Kruskal-Wallis test		Mann-Whitney U test
	H-statistic	P	U-statistic	P
ILI% in South cities	8.7096	0.003*	11855.5	0.003*
ILI% in North cities	29.143	< 0.001*	13524.0	< 0.001*

ILI: influenza-like illness; NPIs: non-pharmaceutical interventions

*P-value < 0.05 with statistical significance