Characteristics of internal migrants in the 2014 National Internal Migrant Dynamic Monitoring Survey (n=170 904)
| Characteristics | No SHI* (n=23 539) | Only NCMS* (n=119 997) | Only UE/RBMI* (n=21 272) | NCMS+UE/RBMI* (n=6096) | Total* (n=170 904) | p Value† |
| Age | 32.5 (9.9) | 33.8 (9.5) | 32.4 (8.7) | 32.4 (8.6) | 33.4 (9.4) | <0.001 |
| Duration of migration (months) | 37 (13–79) | 36 (14–72) | 39 (15–83) | 38 (14–79) | 36 (14–74) | <0.001 |
| Number of people per household† | 2.5 (1.2) | 2.6 (1.2) | 2.4 (1.2) | 2.4 (1.2) | 2.6 (1.2) | <0.001 |
| Monthly household income (US$)† | 662 (441–882) | 706 (441–882) | 735 (515–1029) | 735 (515–1029) | 735 (441–897) | <0.001 |
| Annual household expenditure (US$)† | 3529 (2647–5294) | 4147 (2647–5471) | 4412 (2824–6176) | 4412 (2647–6176) | 4059 (2647–5647) | <0.001 |
| Sex | <0.001 | |||||
| Male | 13 521 (57.4) | 70 359 (58.6) | 12 673 (59.6) | 3648 (59.8) | 100 201 (58.6) | |
| Female | 10 018 (42.6) | 49 638 (41.4) | 8599 (40.4) | 2448 (40.2) | 70 703 (41.4) | |
| Marital status | ||||||
| Married | 15 997 (68.0) | 94 720 (78.9) | 15 690 (73.8) | 4646 (76.2) | 131 053 (76.7) | <0.001 |
| Single | 7542 (32.0) | 25 277 (21.1) | 5582 (26.2) | 1450 (23.8) | 39 851 (23.3) | |
| Education level | ||||||
| Primary school and less | 4410 (18.7) | 19 930 (16.6) | 1888 (8.9) | 636 (10.4) | 26 864 (15.7) | <0.001 |
| Secondary school | 13 196 (56.1) | 72 359 (60.3) | 9313 (43.8) | 3072 (50.4) | 97 940 (57.3) | |
| High school | 4342 (6.8) | 21 799 (18.2) | 5442 (25.6) | 1539 (25.2) | 33 122 (19.4) | |
| College and above | 1591 (6.8) | 5909 (4.9) | 4629 (21.8) | 849 (13.9) | 12 978 (7.6) | |
| Employment status | ||||||
| Employee | 11 793 (50.1) | 51 967 (43.3) | 16 260 (76.4) | 4640 (76.1) | 84 660 (49.5) | <0.001 |
| Employer | 1879 (8.0) | 9836 (8.2) | 1177 (5.5) | 319 (5.2) | 13 211 (7.7) | |
| Self-employed | 6101 (25.9) | 42 649 (35.5) | 2618 (12.3) | 792 (13.0) | 52 160 (30.5) | |
| Unemployed | 3766 (16.0) | 15 546 (13.0) | 1217 (5.7) | 345 (5.7) | 20 873 (12.2) | |
| Migrating with families | <0.001 | |||||
| Yes | 16 727 (71.1) | 93 353 (77.8) | 15 259 (71.7) | 4341 (71.2) | 129 680 (75.9) | |
| No | 6812 (28.9) | 26 644 (22.2) | 6013 (28.3) | 1755 (28.8) | 41 224 (24.1) | |
| Covered by private health insurance | <0.001 | |||||
| Yes | 1067 (4.5) | 3360 (2.5) | 1231 (5.8) | 546 (9.0) | 6204 (3.6) | |
| No | 22 467 (95.5) | 116 622 (97.2) | 20 041 (94.2) | 5550 (91.0) | 164 680 (96.4) | |
| Region of sending provinces | <0.001 | |||||
| Eastern China | 8114 (34.5) | 32 017 (26.7) | 7978 (37.5) | 1983 (32.5) | 50 092 (29.3) | |
| Central China | 7562 (32.1) | 44 177 (36.8) | 6573 (30.9) | 2323 (38.1) | 60 635 (35.5) | |
| Western China | 7863 (33.4) | 43 803 (36.5) | 6721 (31.6) | 1790 (29.4) | 60 177 (35.2) |
US$1=¥6.8.
Data are mean (SD), median (IQR) or n (%).
*Numbers might not add up to the column total because of missing data.
†p Values for analysis of variance with four groups.
‡Household only included persons who live and eat together at current residence.
SHI, social health insurance; NCMS, new rural cooperative medical scheme; UE/RBMI, urban employee-based/resident-based basic medical insurance scheme.