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. 2010 Aug 29;9:54. doi: 10.1186/1476-069X-9-54

Table 3.

Demographic characteristics, as reported by respondent during interview, for the northern and central California 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%

aOf the 499 northern California households enrolled, 462 completed a first-year demographic interview.

bOf the 156 central California households enrolled, 153 completed a first-year demographic interview.