Table 1.

Basic characteristics of socioeconomic indicators and COVID-19 cases in the 39 well-developed cities.

Variables, (median, interquartile range)	No. of cities	Variables, (median, interquartile range)	No. of cities
Number of cases (n), 93 (54.63–180.76)
<50	7	Proportion of tertiary industry (%),58.00 (50.88–61.37)
50–99	14	<50	7
100–350	12	50–60	19
>350	6	>60	13
Number of travelers from Wuhan (n), 9000.00 (5694.00–19250.00)		Number of rural-to-urban migrants (10, 000), 196.67 (121.00–387.50)
<8,000	17	<150	14
8,000–25,000	15	150–400	15
>25,000	7	>400	10
Population (10, 000), 820.00 (573.25–1057.25)		Proportion of migrants (%), 26.76 (17.37–44.24)
<500	8	<20	12
500–1,000	20	20–40	16
>1,000	11	>40	11
Population density (person/km2), 830.97 (617.64–1057.25)		Urbanization rate (%),74.97 (70.07–82.98)
<500	7	60–70	9
500–1,000	18	70–80	18
>1,000	14	>80	12
GDP (RMB 100 million), 7996.70 (4811.80–12615.30)		Native population (10, 000), 530.00 (386.50–759.50)
<5000	11	<500	17
5,000–10,000	13	500–1,000	16
>10,000	15	>1,000	6
Per-person GDP (RMB 1,000), 97.32 (76.46–133.91)		Traffic capacity (million per year), 101.00 (58.56–199.68)
<50	2	<50	6
50–100	19	50–150	19
>100	18	>150	14
Per-person disposable income (RMB 1,000), 42.99 (34.20–50.69)		Number of hospitals (n), 174 (115.25–308.75)
<30	4	<100	7
30–50	23	100–300	22
>50	12	>300	10