Table 1.

Study Designs of the Four Samples

Sample	1	2	3	4
Design	Cross-sectional	Cross-sectional	Cross-sectional	Longitudinal
Selection Criterion	Does not go to dentist	Does not go to dentist	Does not go to dentist	Presence of severe caries
Questionnaires:
Ladder	Yes	Yes	Yes	Yes
Dental Neglect Scale	Yes
Modified Dental Anxiety Scale		Yes
Dental Anxiety Scale			Yes
Revised Dental Beliefs Survey				Yes
Question About Future Dental Visits		Yes	Yes
Dental Examination: Field vs. Traditional	Field	Field	Traditional	Field
Dental Disease:
Number of Carious Teeth	Yes	Yes	Yes	No1
Severity of Caries	Yes	Yes	Yes	No1

¹Severe caries was the criterion for inclusion in this sample.