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. Author manuscript; available in PMC: 2016 Oct 1.
Published in final edited form as: Drug Alcohol Depend. 2015 Aug 25;155:76–82. doi: 10.1016/j.drugalcdep.2015.08.014

Table 1.

Demographic Characteristics of the Study Sample, by Gender

Male (n=580)
n (%)
Female (n=565)
n (%)
Total (N=1145)
n (%)
Age
    Mean (SD) 36.1 (7.9) 35.8 (7.5) 35.9 (7.7)
    18–30 150 (25.9) 147 (26.0) 297 (25.9)
    31–40 202 (34.8) 214 (37.9) 416 (36.3)
    41–45 228 (39.3) 204 (36.1) 432 (37.7)
Ethnicity
    Han ethnicity 579 (99.8) 561 (99.3) 1140 (99.6)
    Minority ethnicity 1 (0.2) 4 (0.7) 5 (0.4)
Marital status
    Married 488 (84.1) 537 (95.0) 1025 (89.5)
    Not married 92 (15.9) 28 (5.0) 120 (10.5)
Education
    Elementary school 91 (15.7) 235 (41.6) 326 (28.5)
    Middle school 349 (60.2) 273 (48.3) 622 (54.3)
    High school or higher 140 (24.1) 57 (10.1) 197 (17.2)
Engagement in farming
    Yes 260 (44.8) 263 (46.5) 523 (45.7)
    No 320 (55.2) 302 (53.5) 622 (54.3)
Annual income
    ≤$1625 150 (25.9) 172 (30.4) 322 (28.1)
    $1626-$3250 176 (30.3) 180 (31.9) 356 (31.1)
    $3251-$6500 181 (31.2) 171 (30.3) 352 (30.7)
    >$6500 73 (12.6) 42 (7.4) 115 (10.0)
Family size
    1 to 2 persons 13 (2.2) 7 (1.2) 62 (11.0)
    3 persons 132 (22.8) 138 (24.4) 318 (56.2)
    4 or more persons 435 (75.0) 420 (74.4) 186 (32.9)