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Table 3 Demographic characteristics, as reported by respondent during interview, for the northern and central California cohorts

From: Study of Use of Products and Exposure-Related Behaviors (SUPERB): study design, methods, and demographic characteristics of cohorts

  Northern California Family Cohort Central California Older Adult Cohort
  Tier 1a Tier II Tier III Tier Ib Tier II Tier III
Households (n) 499 186 30 156 64 17
Mean age 37 35.7 34.7 66 63.8 68.6
Female age group (n) 412 157 28 102 41 13
   18-34 years 35.0% 37.6% 32.1% n/a n/a n/a
   35-54 years 57.3% 61.8% 53.6% 2.9% 4.9% n/a
   55-64 years 0.5% 0.6% 0.0% 47.1% 58.5% 30.8%
   65+ years 0.0% 0.0% 0.0% 49.0% 36.6% 53.8%
   Missing 7.3% 0.0% 14.3% 1.0% 0.0% 15.4%
Male age group (n) 87 29 2 54 23 4
   18-34 years 24.1% 34.5% 50.0% n/a n/a n/a
   35-54 years 65.5% 62.1% 50.0% n/a n/a n/a
   55-64 years 2.3% 3.4% 0.0% 55.6% 56.5% 75.0%
   65+ years 0.0% 0.0% 0.0% 40.7% 43.5% 25.0%
   Missing 8.0% 0.0% 0.0% 3.7% 0.0% 0.0%
Adult sex 499 186 30 156 64 17
   Female 82.6% 84.4% 93.3% 65.4% 64.1% 76.5%
   Male 17.4% 15.6% 6.7% 34.6% 35.9% 23.5%
   Missing 0.0% 0.0% 0.0% 0.6% 0.0% 0.0%
Female education level (n) 412 157 28 102 41 13
   0 -11 years 7.3% 1.3% 3.6% 3.9% 0.0% 7.7%
   12 years 12.9% 8.3% 7.1% 16.7% 7.3% 7.7%
   13-15 years 23.3% 28.7% 14.3% 40.2% 46.3% 38.5%
   16 years 28.2% 31.2% 39.3% 18.6% 24.4% 23.1%
   >16 years 20.9% 30.6% 21.4% 18.6% 22.0% 7.7%
   Missing 7.5% 0.0% 14.3% 2.0% 0.0% 15.4%
Male education level (n) 87 29 2 54 23 4
   0-11 years 3.4% 10.3% 50.0% 3.7% 0.0% 0.0%
   12 years 10.3% 17.2% 0.0% 3.7% 0.0% 0.0%
   13-15 years 19.5% 31.0% 50.0% 24.1% 21.7% 25.0%
   16 years 26.4% 41.4% 0.0% 37.0% 43.5% 50.0%
   >16 years 32.2% 0.0% 0.0% 25.9% 34.8% 25.0%
   Missing 8.0% 0.0% 0.0% 5.6% 0.0% 0.0%
Race/ethnicity (n) 499 186 30 156 64 17
   Non-Latino white 50.5% 63.4% 73.3% 76.3% 84.4% 52.9%
   Latino (of any race) 20.5% 12.9% 20.0% 10.3% 7.8% 29.4%
   African American 2.8% 2.2% 0.0% 1.3% 0.0% 0.0%
   Asian 10.8% 9.7% 3.3% 0.0% 0.0% 0.0%
   Other 5.0% 7.5% 0.0% 6.4% 4.7% 5.9%
   Multiple 2.8% 4.3% 0.0% 3.2% 3.1% 5.9%
   Missing 7.6% 0.0% 3.3% 2.6% 0.0% 5.9%
Employment status (n) 499 186 30 156 64 17
   Retired 0.2% 0.5% 0.0% 46.2% 46.9% 52.9%
   Employed 46.9% 54.8% 30.0% 37.8% 42.2% 23.5%
   Stay at home parent 35.1% 36.0% 53.3% 2.6% 0.0% 5.9%
   Unemployed 2.4% 1.1% 3.3% 5.8% 6.3% 0.0%
   Other 7.6% 7.5% 0.0% 5.1% 4.7% 5.9%
   Missing 7.8% 0.0% 13.3% 2.6% 0.0% 11.8%
Foreign born (n) 499 186 30 156 64 17
   Yes 28.5% 22.6% 20.0% 8.3% 4.7% 5.9%
   No 64.1% 77.4% 66.7% 89.1% 95.3% 82.4%
   Missing 7.4% 0.0% 13.3% 2.6% 0.0% 11.8%
Homeowner (n) 499 186 30 156 64 17
   Yes 70.1% 78.5% 73.3% 87.2% 92.2% 76.5%
   No 22.2% 21.5% 13.3% 10.3% 7.8% 11.8%
   Missing 7.6% 0.0% 13.3% 2.6% 0.0% 11.8%
Marital status (n) 499 186 30 156 64 17
   Married/living together 87.2% 95.7% 80.0% 57.7% 68.8% 47.1%
   Widowed 0.0% 0.0% 0.0% 21.2% 12.5% 23.5%
   Divorced/separated 1.6% 1.1% 3.3% 13.5% 15.6% 11.8%
   Single 3.4% 3.2% 3.3% 5.1% 3.1% 5.9%
   Missing 7.8% 0.0% 13.3% 2.6% 0.0% 11.8%
Survey in Spanish (n) 499 186 30 156 64 17
   Yes 10.2% 1.1% 10.0% 2.6% 0.0% 5.9%
   No 82.6% 98.9% 76.7% 95.5% 100.0% 88.2%
   Missing 7.2% 0.0% 13.3% 1.9% 0.0% 5.9%
  1. aOf the 499 northern California households enrolled, 462 completed a first-year demographic interview.
  2. bOf the 156 central California households enrolled, 153 completed a first-year demographic interview.