Table 2. Weekly statistical results of the main indicators in the time series Poisson generalized additive model^#.

Variables	Mean	Standard deviation	Median	Min	Max	P25	P75
No. ILI cases	1050.25	2.30	871	230	3119	680	1236.5
No. outpatients*	25836	7875	23575	10992	52011	20225	30013
ILI/outpatient (%)**	4.01	1.40	4.00	1.70	9.44	2.82	5.00
Isolation rate (%)**	12.93	17.88	5.77	0	79.07	0	20
No. hospitalizations*	337	50	342	132	436	312	369
Mean temperature(°C)	22.78	5.38	24.00	6.20	32.00	19.00	27.40
Relative humidity (%)	76	13	78	32	95	69	86

Note: ILI% is the percentage of influenza-like illness (ILI) cases out of the total outpatient visits. The positive rate is the proportion of the number of influenza virus–positive specimens to the total specimens detected. Mean temperature and relative humidity were used in the model for controlling for the potential confounding influence of meteorological factors.

* Dependent variables in the model;

** independent variable, which stands as influenza proxy.

^#, estimates that are aggregated results from multiple separate models, which means influenza proxy (**) are included in the model one at a time.