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Home » Data, publications and reports » Smile Survey 2006 » Burden of disease

2005 Smile Survey Summary
Disproportionate Burden of Disease

The survey recorded information on race/ethnicity, language spoken at home and participation in Free/Reduced Lunch programs. Findings from the survey show that children from low income families, children from families of color, and immigrant/refugee families are significantly more likely to suffer from dental disease.

Poverty

Participation in the Free and/or Reduced Lunch program (FRL) is often used as a proxy for low income. Based on this measure, results indicate that King County and Seattle children from low-income families have higher rates of dental disease. (See Table Two.)

Table Two: Oral Health Measures Stratified
by Free/Reduced Lunch Eligibility

Variable
WA State*
State
King County
King County
Seattle
Seattle
Not Eligible
Eligible
Not Eligible
Eligible
Not Eligible
Eligible
(n=4118)
(n=2538)
(N=1150)
(n=597)
(N=587)
(n=433)
% with caries experience
50.8%
70.5%
37.3%
64.4%
30.9%
63.3%
% with untreated decay
14.6%
26.6%
11.0%
26.9%
9.6%
28.9%
% with rampant caries
15.8%
29.1%
13.2%
28.8%
9.3%
17.2%

(* State sample includes King County and Seattle .)

Graph Two: Eligibility for Free Lunch Program and Untreated Decay

Graph Two: Eligibility for Free Lunch Program and Untreated Decay
Enlarge image
Students eligible for FRL programs in King County are at least twice as likely, and in Seattle , three times as likely, to have untreated decay when compared to students not eligible for FRL programs within the same samples. (See Graph Two.)

Note on data collection: FRL information was obtained through school districts’ nutritional services departments. For the data collected statewide, information on FRL participation was missing for eight percent of the students, as some school districts chose not to share the information.  For the King County and Seattle samples, FRL information was missing for less than one percent of the students.

Race/Ethnicity

In all three samples, dental disease impacts children of color at a significantly higher rate.  For the categories of caries experience and untreated disease, white children show statistically significant lower rates.  (See Table Three.) The King County and Seattle samples were not statistically significantly different from each other.

Table Three: Comparison of Rates of Caries Experience
by Race/Ethnicity

Area
White
African American
Hispanic
Asian/PI
Native American
WA State
55%
60%
72%
68%
77%*
King County
37%
55%
58%
67%
*
Seattle
29%
55%
57%
66%
*

Graph Three: Comparison of Untreated Decay Rates By Race

Graph Three: Comparison of Untreated Decay Rates By Race
Enlarge image
(*Note on data collection: The state survey included Native American students that were surveyed through the Indian Health Services (IHS) and tribal dental clinics. The King County and Seattle samples do not include information from surveys completed by IHS or tribal dental clinics. Rates for Native Americans in King County or Seattle are not reported because, with relatively small numbers of Native Americans in these samples, the confidentiality promised to survey respondents could be compromised and the numbers are not large enough to report reliable rates.)

The most statistically significant differences are shown in rates of untreated decay, with King County children of color twice as likely and Seattle children of color are three times as likely to have the condition. (See Graph Three.)

Language

All three samples (state, King County , and Seattle ) indicate a difference in caries experience between students with English as a primary language and those indicating another language spoken at home. There are no statistically significant differences among the three survey samples. (See Table Four.)

Table Four: Oral Health Measures Stratified by Language
for 2nd and 3rd Grade Students

Variable
WA State
WA State
King County
King County
Seattle
Seattle
English
Other Language
English
Other Language
English
Other Language
(n=6290)
(n=986)
(n=1441)
(n=314)
(n=752)
(n=269)
% with caries experience
56.7%
73.6%
42.7%
65.8%
37.6%
66.0%
% with untreated decay
18.0%
30.8%
14.5%
27.6%
14.4%
28.7%

Students whose primary language is not English are more likely to have caries experience. Of more immediate concern, they are also more likely to have untreated decay.

Graph Four: Untreated decay by primary language

Graph Four: Untreated decay by primary language
Enlarge image
Students were asked what language was spoken at home to determine language. The data mixes both students newly arrived in the United States and those who have been living in the country for a longer period. Students speaking languages other than English may face additional barriers in getting care. Primary languages spoken may also reflect cultural beliefs that affect the prevalence of dental disease. Examining these aspects of primary languages spoken are beyond the scope of this survey.

Updated: Monday, April 24, 2006 at 01:31 PM

All information is general in nature and is not intended to be used as a substitute for appropriate professional advice. For more information please call 206-296-4600 (voice) or TTY Relay: 711. Mailing address: ATTN: Communications Team, Public Health - Seattle & King County, 401 5th Ave., Suite 1300, Seattle, WA 98104 or click here to email us.

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