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Table 1 Sociodemographic characteristics of the sample by residence status and gender n(%)

From: Smoking, cessation and expenditure in low income Chinese: cross sectional survey

   Urban Rural Migrant
   M F M F M F
   N = 843 n = 1115 n = 749 n = 1160 n = 2198 n = 1050
Age in years Mean (SD) 36 (12.1) 34 (8.8) 39 (13.4) 35 (11.9) 29 (8.3) 25 (6.8)
Education Primary 88 (11) 93 (8.4) 378 (50) 915 (79) 253 (11) 126 (12)
  Middle 278 (33) 425 (38) 250 (33) 187 (16) 1259 (58) 683 (65)
  High 309 (37) 416 (37) 106 (14) 47 (4.1) 616 (28) 220 (21)
  Tertiary 168 (18) 170 (15) 15 (2) 11 (0.9) 66 (2.7) 21 (2.0)
Marital status Single 172 (20) 134 (12) 85 (11) 38 (3.3) 934 (43) 557 (53)
  Married 659 (78) 946 (85) 624 (83) 1041 (89) 1203 (55) 484 (46)
  Other 12 (1.4) 35 (2.9) 40 (5.3) 81 (7) 61 (2.5) 9 (0.9)
Child/ren Yes 617 (73) 920 (83) 642 (86) 1101 (95) 1105 (50) 399 (38)
Occupation Agriculture 30 (3.5) 35 (3.1) 584 (78) 731 (63) 2 (0.2) 0
  Factory** 420 (49) 460 (41) 16 (2) 58 (5) 903 (39) 617 (59)
  Construction 22 (2.6) 5 (0.5) 0 0 599 (29) 2 (0.2)
  Hotels/bars 101 (12) 280 (25) 13 (2) 70 (6) 549 (20) 229 (22)
  Retail (shops) 85 (10) 113 (10) 14 (2) 0 131 (6) 11 (1)
  Transport 0 0 7 (1) 0 14 (1.2) 3 (0.3)
  Domestic service 16 (2) 2 (0.2) 0 35 (3) 0 29 (2.8)
  Self-employed 118 (14) 111 (10) 46 (6) 81 (7) 73 (3.3) 65 (6.3)
  Other 51 (6) 109 (9.9) 67 (9) 185 (16) 35 (1.6) 33 (3)
Personal Income/Month in RMB* <700 46 (5.5) 178 (16) 471 (63) 840 (72) 329 (15) 283 (27)
  701–1500 506 (60) 710 (64) 258 (34) 304 (26) 1626 (74) 703 (67)
  >1501 291 (35) 227 (01) 20 (2.7) 16 (1.4) 243 (11) 64 (6.1)
  Median (IQR) 1100 (1200) 900 (600) 550 (500) 480 (400) 900 (250) 800 (250)
  1. *US$1 = 8.2 Chinese Renminbi (RMB)
  2. ** Of the 34 factories involved 16 were textile, 6 foodstuff, 5 electrical, 4 steel, 3 chemical