. Author manuscript; available in PMC: 2009 Sep 10.

Published in final edited form as: Tob Control. 2008 Dec 22;18(2):132–137. doi: 10.1136/tc.2007.024307

Table 2.

Population characteristics of geopolitical units (GPUs) in the Minnesota Adolescent Community Cohort sample, by clean indoor air policy status

Community-level characteristics^◆	Total Mean (SD)	Policy^‡ Mean (SD)	No Policy Mean (SD)
Population aged 18 and older (%)^**	73.9% (4.7)	75.6% (6.4)	73.3% (3.8)
Population 25+ with college degree or higher (%)^**	25.6% (12.8)	34.9% (14.5)	22.7% (10.6)
Percentage rural ^**	34.3% (33.2)	6.1% (16.4)	43.3% (32.1)
Percentage White race ^**	89.4% (14.0)	73.3% (21.8)	92.9% (7.4)
Median income ^**	$48,546 (14,640)	$50,837 (15,407)	$47,811 (14,311)

p<0.05,

^**

p<0.01

^‡

Policy defined by any local clean indoor air policy in the city of residence by the end of the study period.

^◆

Census 2000 [1]