Key points are not available for this paper at this time.
Henry Klein, Carroll E. Palmer, John W. Knutson, Studies on Dental Caries: I. Dental Status and Dental Needs of Elementary School Children, Public Health Reports (1896-1970), Vol. 53, No. 19 (May 13, 1938), pp. 751-765
Klein et al. (Sat,) studied this question.