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Table 2 Smoking prevalence and second-hand smoke exposure by demographics, migration history and working conditions

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

  Current smokers SHS
Male Female Total
Variables N (%) χ2 P N (%) χ2 P N (%) χ2 P
Age (y)
 15–29 780(53.0) 11.413 0.003 40(3.2) 6.447 0.040 1, 236(65.0) 0.026 0.987
 30–39 924(53.1)    33(3.2)    1, 179(65.2)   
 40–59 648(58.9)    33(5.4)    674(65.3)   
Education level
 Primary school and below 460(58.8) 39.688 < 0.001 29(4.3) 4.378 0.223 633(65.1) 0.235 0.972
 Junior high school 1, 135(56.8)    39(3.1)    1, 338(64.8)   
 Senior high school 513(53.0)    28(4.7)    674(65.7)   
 College 244(43.3)    10(2.7)    444(65.3)   
Marital status
 Never married 372(53.4) 1.675 0.433 17(3.4) 12.462 0.002 544(67.7) 5.988 0.050
 Married 1, 957(54.7)    84(3.6)    2, 524(64.8)   
 Divorced/widowed 23(63.9)    5(15.2)    21(51.2)   
Duration of stay (y)
 0–2 120(74.5) 8.673 0.034 8(2.6) 2.507 0.474 326(71.3) 12.081 0.007
 2–5 218(68.1)    24(3.9)    613(66.9)   
 5–10 363(64.8)    37(4.4)    885(64.5)   
 > 10 586(63.4)    37(3.3)    1, 265(63.3)   
Working hours per week (hrs.)
 ≤ 40 427(50.0) 10.934 0.004 20(2.9) 1.768 0.413 673(60.8) 21.147 < 0.001
 40–70 1, 434(56.4)    66(3.9)    1, 860(67.8)   
 > 70 491(53.6)    20(4.1)    556(62.2)   
Household registration status
 Agricultural 1, 908(55.6) 7.573 0.003 75(3.2) 5.931 0.015 2, 437(64.8) 0.893 0.182
 Nonagricultural 443(50.4)    31(5.4)    651(66.4)   
Employment
 Yes 1, 291(53.0) 5.484 0.019 60(3.5) 0.385 0.535 1, 838(65.6) 0.562 0.454
 No 1, 061(56.6)    46(3.9)    1, 251(64.5)   
Occupational type
 Professional and technical personnel 283(45.0) 30.611 < 0.001 12(5.0) 3.715 0.294 350(61.3) 7.741 0.052
 Business and service personnel 1, 449(55.2)    75(3.8)    2, 042(66.3)   
 Production, transportation and facility operation personnel 565(58.9)    16(3.3)    546(63.0)   
 Agricultural, unemployed and others 55(54.5)    3(1.6)    151(66.8)   
Employer nature
 Within the system 226(51.7) 5.503 0.064 11(5.6) 2.478 0.290 276(70.1) 10.858 0.004
 Outside the system 1, 889(54.3)    86(3.6)    2, 549(65.3)   
 Agricultural, unemployed and others 237(59.5)    9(3.1)    264(59.3)   
Migration type
 Trans-provincial 1, 558(55.0) 9.796 0.007 71(3.8) 1.58 0.454 1, 991(64.4) 12.594 0.002
 Trans-municipal 574(52.5)    24(3.1)    832(64.6)   
 Trans-county 220(60.6)    11(4.8)    266(73.7)   
Total 2, 352(54.5)    106(3.7)    3, 089(65.1)