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Table 1 General characteristics of respondents

From: The prevalence of smoking, second-hand smoke exposure, and knowledge of the health hazards of smoking among internal migrants in 12 provinces in China: a cross-sectional analysis

Variable Male (N = 4313) Female (N = 2887) Total (N = 7200)
N % N % N %
Age (m ± SD)(y) 33.89 ± 8.56 32.37 ± 8.46 33.28 ± 0.10
Education year (m ± SD)(y) 10.24 ± 2.91 9.87 ± 3.30 10.09 ± 0.36
Duration of stay (m ± SD)(y) 10.32 ± 6.64 8.84 ± 5.98 9.72 ± 6.43
Working hours per week (m ± SD)(hrs.) 60.54 ± 17.75 57.42 ± 17.43 59.28 ± 17.69
Marital status
 Never married 628 14.6 497 17.2 1, 194 16.6
 Married 2, 625 60.9 2, 357 81.6 5, 937 82.5
 Divorced/widowed 959 22.2 33 1.1 69 1.0
Household registration status
 Agricultural 3, 433 79.6 2, 309 80.0 5, 742 79.8
 Nonagricultural 879 20.4 576 20.0 1, 458 20.2
Employment
 Yes 2, 437 56.5 1, 718 59.5 4, 155 57.7
 No 1, 876 43.5 1, 169 40.5 3, 045 42.3
Occupational type
 Professional and technical personnel 628 14.6 238 8.2 866 12.0
 Business and service personnel 2, 625 60.9 1, 976 68.4 4, 601 63.9
 Production, transportation and facility operation personnel 959 22.2 490 17.0 1, 449 20.1
 Agricultural, unemployed and others 101 2.3 183 6.3 1, 449 3.9
Employer nature
 Within the system 437 10.1 195 6.8 632 8.8
 Outside the system 3, 478 80.6 2, 400 83.1 5, 878 81.6
 Agricultural, unemployed and others 398 9.2 292 10.1 690 9.6
Migration type
 Trans-provincial 2, 835 65.7 1, 888 65.4 4, 723 65.6
 Trans-municipal 1, 115 25.9 771 26.7 1, 886 26.2
 Trans-counties 363 8.4 228 7.9 591 8.2