Table 1 Prevalence of thyroid shield usage by decade, gender and patient's age
From: Thyroid shields and neck exposures in cephalometric radiography
Thyroid Shield | 1973–1990 | 1991–2000 | 2001–2003 | Overall |
|---|---|---|---|---|
Overall | 2.9% | 47.9% | 10.4% | 19.2% |
Gender | ||||
Females | 1.9% | 53.7% | 12.8% | 16.3% |
Males | 4.3% | 38.7% | 7.9% | 21.3% |
Age group | ||||
Adults (> 20 years old) | 7.3% | 51.2% | 42.9% | 24.8% |
Children and adolescent | 1.8% | 47.0% | 7.1% | 17.9% |