Table 2.
Study characteristics | Frequencies | Percentages |
---|---|---|
Type of research | ||
Epidemiology | 32 | 53 |
Outcomes | 16 | 27 |
Health services | 10 | 17 |
Other | 2 | 3 |
Research design | ||
Cross-sectional | 25 | 42 |
Cohort | 20 | 33 |
Case control | 8 | 13 |
Longitudinal | 5 | 8 |
Quasi-experimental | 1 | 2 |
Randomized control trial | 1 | 2 |
Sample size | ||
1 – 999 | 35 | 57 |
1000 – 5000 | 11 | 19 |
5001 – 99,999 | 11 | 19 |
100,000 + | 3 | 5 |
Follow-up period | ||
0 – 2 years | 26 | 43 |
3 – 9 years | 23 | 38 |
10 + years | 11 | 19 |
Patient care setting | ||
Dental school clinics | 15 | 25 |
Dental HMOs | 11 | 19 |
VA medical centers | 11 | 19 |
Public dental health centers/nursing home | 10 | 17 |
Other hospitals/clinics | 7 | 10 |
Private dental practices | 6 | 10 |
Research setting | ||
VA medical centers | 9 | 15 |
Kaiser Permanente | 9 | 15 |
Dental insurance groups | 3 | 5 |
Other | 39 | 65 |