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. 2011 Oct 21;4:433. doi: 10.1186/1756-0500-4-433

Table 1.

Participant characteristics

Characteristic Value (percent)
Sex
 Male 482 (39.3%)
 Female 745 (60.7%)
Age
 Age range 15-94 years
 Mean age 39 years
Education*
 Elementary school (1-8 years) 329 (27.9%)
 Some high school (9-11 years) 324 (27.5%)
 High school graduation (12 years) 370 (31.4%)
 Some college (> 12 years) 157 (13.3%)
Monthly Household Income†
 Under $500 181 (16.2%)
 $500-$749 159 (14.2%)
 $750-$999 143 (12.8%)
 $1000-$1249 171 (15.3%)
 $1250-$1499 117 (10.5%)
 $1500-$1999 123 (11.0%)
 $2000-$2999 127 (11.4%)
 $3000 and above 95 (8.5%)
Residence
 Texas 1211(98.7%)
 Other US location 16 (1.3%)

*Information available for 1180 participants

†Information available for 1116 participants