Table 1.

Evaluation index system of social vulnerability in Nanjing.

Variable	No.	Name	Description and Measurement	Impact	Data Source
Demographic indicators					[5,9]
Age structure	1	P75	Percent of population over 75 years	+
	2	P14	Percent of population under 14 years	+
	3	PKP	Percent of population under kindergarten and primary school age	+
Gender	4	PFEM	Percent of females	+
Rural	5	PAGR	Proportion of agricultural household registration	+
Immigrant	6	PMIG	Percent of immigrants	+
Education	7	PlowEDU	Percent of low-education population (≤9 years of education)	+
	8	PILLITER	Percent of illiterate population	+
Population	9	PDNSTY	Population density	+
Economic indicators					[9,35,36]
Home value	10	AVEHPRI	Average house prices	-
	11	DRET	Retail density	-
	12	AVEHARE	Housing area per capita	-
Construction density	13	DCORP	Corporate density	+
	14	PCONSTR	Proportion of construction land	+
Facilities indicators					[5,9,34]
Unsafe conditions	15	DKIN	Kindergarten density	+
	16	DPRI	Primary school density	+
	17	DMID	Middle school density	+
	18	DNURS	Nursing home density	+
Service facilities	19	DBUS	Bus station density	-
	20	DPS	Park and square density	-
	21	DHOSP	Hospital density	-

Note: When an indicator is positively correlated with social vulnerability, the impact of this indicator is signed as “+”, indicating that the high value of this indicator may increase social vulnerability. In contrast, when an indicator has a negative relationship with social vulnerability, the impact of this indicator is signed as “-”, indicating that the high value of this indicator may decrease social vulnerability.