Table 1

Social economic demographics of migrants by migratory cities

	Beijing		Nanjing
	No	%	No	%	p Value
*Sauna club, bath house, karaoke room, beauty salon, massage parlour, and dance hall.
†Other family number, co-workers, follow villagers, and relatives.
Sex					0.29
Male	645	65.0	780	67.2
Female	347	35.0	381	32.8
Age (years)					<0.01
Mean (SD)	25.0 (3.5)		26.1 (3.6)
Education					0.05
Primary school or less	69	7.0	89	7.8
Middle school	552	55.8	590	51.3
High school	324	32.8	385	33.5
Post secondary school	43	4.4	85	7.4
Ethnicity					0.99
Han	956	96.9	1113	96.9
Minorities	31	3.1	36	3.1
Marriage status					<0.01
Married	467	47.7	454	41.4
Single	512	52.3	643	58.6
Current working place					0.39
No job	24	2.4	58	5.0
Hotel or restaurant	164	16.6	218	18.9
Entertainment*	332	33.5	308	26.7
Construction site	234	23.6	324	28.1
Peddler market	103	10.4	99	8.6
Domestic service	53	5.4	18	1.5
Others	80	8.1	129	11.2
Monthly income in US$					0.04
⩽57	147	14.8	202	17.4
58–80	198	20.0	253	21.8
81–115	220	22.2	241	20.8
>115	427	43.0	465	40.0
Mobility index					0.06
0.06–0.30	248	25.0	322	28.7
0.31–0.49	189	19.0	241	21.4
0.50–0.70	291	29.3	274	24.4
0.71–1.00	180	18.2	189	16.8
1.01–10.00	84	8.5	98	8.7
To whom resided in city					0.84
Alone	109	11.0	125	10.8
Spouse or children	321	32.4	386	33.3
Others†	562	56.6	647	55.9
No. of job taken					0.84
1 or no job	298	30.0	325	28.0
2	274	27.6	360	31.0
3	233	23.5	271	23.3
4	94	9.5	90	7.8
>4	93	9.4	115	9.9