Table 1.

Demographic and Behavioral Characteristics and Outcomes of Iowa Fluoride Study Participants (Number of participants with available data is provided for each variable)

Demographic Variables	Count (%)
SES at Participant Birth (n=399)
Low	91 (22.8%)
Middle	141 (35.3%)
High	167 (41.9%)
Household Income in 2007 (n=395)
< $40,000	57 (14.4%)
$40,000 – $59,999	67 (17.0%)
$60,000 – $79,999	81 (20.5%)
≥ $80,000	190 (48.1%)
Sex (n=413)
Male	194 (47.0%)
Female	219 (53.0%)
Behavioral Variables	Mean (SD)
Proportion of Questionnaire Responses with Dental Attendance in the Previous 6 Months (n=411)	0.8 (0.3)
Daily Brushing Frequency Averaged over 13- to 15-year-old Questionnaires (n=411)	1.6 (0.5)
Daily Brushing Frequency Averaged over 15.5- to 17-year-old Questionnaires (n=384)	1.7 (0.6)
Proportion Of Daily Beverage Intake Consisting of Sugar-Sweetened Beverages Averaged over 13- to 15-year-old Questionnaires (n=411)	0.3 (0.2)
Proportion Of Daily Beverage Intake Consisting of Sugar-Sweetened Beverages Averaged over 15.5- to 17-year-old Questionnaires (n=384)	0.3 (0.2)
Eating Events Per Day at Age 13 (n=406)	4.9 (1.3)
Outcome Variables	Mean (SD)
Permanent DFS Count Age 9 (n=413)	0.5 (1.2)
Adjusted DFS Increment Ages 9 – 13 (n=413)	0.7 (1.7)
Adjusted DFS Increment Ages 13 - 17 (n=413)	2.1 (3.3)