Willems I VS Willems II: A comparative study of accuracy in 5-15 year old Indian children.
BACKGROUND
Studies testing the Willems method of age estimation with gender-specific scores on different population groups have reported consistently more accurate results over other methods. Not enough is known about the validity of Willems non-gender specific scores.


OBJECTIVE
The present study aimed to compare the accuracy of the Willems I (gender-specific scores) and Willems II methods (non-gender-specific scores) in the age estimation of 5-15 year-old Indian children.


METHODS
In this cross-sectional observational study, the Willems I and II methods were tested and compared for accuracy in estimating the age of 1200 Indian children aged 5-15 years.


RESULTS
The mean differences between dental age calculated by the Willems I method and chronological age were +0.09±0.80 years, +0.08±0.80 years and +0.09±0.80 years for boys, girls and the total sample, respectively. With the Willems II method, the values were -0.06±0.80 years, +0.11±0.79 years and +0.01±0.80 years for boys, girls and the total sample, respectively. Both methods did not show any statistically significant differences between dental and chronological ages for either gender or the total sample (p>0.05).


CONCLUSIONS
The Willems I method was more accurate in predicting age of boys, while the Willems II method was more accurate in girls in the present study, but not significantly so. Both methods are appropriate for use in this population.
Department of Paediatric Dentistry, Pacific Dental College & Hospital, Udaipur, Rajasthan, India. Electronic address: drsapnahegde@yahoo.co.in.
Sapna
S
Hegde
Department of Paediatric Dentistry, Pacific Dental College & Hospital, Udaipur, Rajasthan, India.
Akash
A
Patodia
Department of Pediatric and Preventive Dentistry, Dr. D. Y. Patil Dental College and Hospital, Navi Mumbai, India.
Uma
U
Dixit
D000293:Adolescent; D000366:Age Determination by Teeth; D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D005260:Female; D044707:Forensic Sciences / Q000379:methods*; D006801:Humans; D007194:India; D008297:Male; D011862:Radiography, Panoramic; D015203:Reproducibility of Results
Age estimation; Gender-specific scores; Non-gender specific scores; Willems method