Skip to main content

Table 1 Agreement between Pubertal Development Scale and Sexual Maturation Scale methods of assessing breast onset, by sample characteristics in the LEGACY Girls Study

From: Comparison of methods to assess onset of breast development in the LEGACY Girls Study: methodological considerations for studies of breast cancer

Description PDSa vs SMSb
2+ vs 1
No. of subjects Agreement Kappa value 95% CI
All ages combined 1022 89.6 0.8 0.7–0.9
 Daughter aged < 10 years 500 92.4 0.7 0.6–0.8
 Daughter aged ≥ 10 years 522 87 0.5 0.4–0.6
Family history
 Positive 529 90.9 0.8 0.7–0.9
 Negative 493 88.2 0.8 0.7–0.9
BMI percentilec
 BMI ≥ 85th percentile 188 90.4 0.8 0.7–0.9
 BMI < 85th percentile 815 89.6 0.8 0.7–0.9
Race/ethnicity
 White non-Hispanic 636 89.8 0.8 0.7–0.9
 Hispanic 189 89.9 0.8 0.7–0.9
 Other (black, Asian, other) 197 88.8 0.7 0.7–0.9
Site
 Philadelphia 152 92.3 0.7 0.6–0.8
 New York 166 92.2 0.7 0.6–0.8
 Utah 161 92.8 0.7 0.6–0.8
 Ontario 191 93.3 0.8 0.7–0.9
 California 352 91.2 0.7 0.6–0.8
  1. Abbreviations: BMI Body mass index, PDS Pubertal Development Scale, SMS Sexual Maturation Scale
  2. aPDS is a questionnaire-based assessment of breast development without pictures
  3. bSMS is a questionnaire-based assessment of breast development that uses pictures to illustrate the five Tanner stages of breast development
  4. cMissing BMI for 19 girls
\