TABLE 5

Ages of Pubertal Events From Studies of US Boys

StudyMean/Mediana Age of Attainment of a Stage, y (SD, SE, or 95% Clb)
G2G3G4G5PH2PH3PH4PH5
Reynolds and Wines6911.5 (0.9)NSC13.4 (0.7)17.3 (0.8)12.2(1.1)13.3 (0.8)13.9 (0.7)16.1 (1.2)
(1951)
Nicolson and11.8(1.0)13.1 (1.0)13.8(1.0)15.2(1.0)NDNDNDND
Hanley14 (1953)d
NHES III; Karpati et al7NR13.0(13.0-13.1)13.9(13.8-14.0)15.1 (14.8-15.3)NR13.3(13.2-13.4)14.0(13.9-14.1)15.3(15.1-15.5)
(2002)
NHES III; Sun et al65 (2005)ND13.05(12.91-13.17) white; 12.74(12.38-13.02) black13.88(13.72-14.04) white; 13.72 (13.47-13.94) black15.07(14.96-15.18) white; 14.76 (14.42-15.11) blackND13.29(13.20-13.38) white; 13.28(13.01-13.51) black14.04(13.96-14.11) white; 14.03(13.80-14.24) black15.39(15.30-15.49) white; 15.20(14.95-15.46) black
Lee17 (1980)11.9(1.1)13.2(0.8)14.3 (0.8)15.1 (1.1)12.3 (0.8)13.9 (0.9)14.7(0.9)15.3 (0.8)
Bogalusa; Foster et al61 (1977)e11.82 (0.11) white;
11.16(0.185) black
NRNRNR12.52 (0.085) white; 11.72 (0.125) blackNRNRNR
HHANES; Villarreal et al6412.39 (12.14-12.58)13.50(13.27-13.73)14.59(14.35-14.89) Mexican16.26(15.94-16.54) Mexican12.81 (12.43-12.83) Mexican13.62 (13.36-13.84)14.64(14.32-14.94)16.06(15.71-16.33)
(1989)fMexican AmericanMexican AmericanAmericanAmericanAmericanMexican AmericanMexican AmericanMexican American
HHANES; Sun et al65 (2005)ND13.29(12.90-13.70) Mexican American14.38(14.19-14.59) Mexican American16.08(15.76-16.46) Mexican AmericanND13.41 (13.10-13.72) Mexican American14.42(14.17-14.69) Mexican American15.86(15.61-16.14) Mexican American
Biro etal25 (1995)9NDNDNDND12.79 (NR)13.74 (NR)14.63 (NR)15.19 (NR)
NHANES III; Herman-10.1 (9.6-10.6) white;12.4(12.0-12.7) white;13.5 (13.2-13.8) white; 13.415.9 (15.3-16.4) white; 14.912.0(11.7-12.3) white; 11.212.6(12.3-13.0) white;13.5 (13.2-13.8) white;15.7(153-16.0) white;
Giddens et al6 (2001)9.5 (8.9-10.0)11.8 (11.3-12.3) black;(13.1-13.6) black; 13.7(14.4-15.5) black; 15.7(10.9-11.4) black; 12.312.5 (12.3-12.8) black;13.7(13.5-13.9) black;15.4(14.9-15.9) black;
black; 10.4(9.6-12.5(12.2-12.8)(13.4-14.1) Mexican(15.3-16.2) Mexican(12.1-12.5) Mexican13.1 (12.9-13.3)14.1 (13.8-14.4)15.8(15.5-16.2)
11.1) Mexican AmericanMexican AmericanAmericanAmericanAmericanMexican AmericanMexican AmericanMexican American
NHANES III; Karpati et al710.1 (9.6-10.6) white;12.4(12.1-12.7) white;13.5 (13.2-13.8) white; 13.416.0 (15.4-16.6) white; 14.912.0(11.7-12.3) white; 11.112.7(12.3-13.0) white;13.6(13.3-13.9) white;15.6(15.2-16.0) white;
(2002)9.3 (3.7-9.9) black.;11.8 (11.3-12.3) black;(13.2-13.7) black; 13.8(14.3-15.5) black; 15.8(10.8-11.5) black; 12.312.6(12.3-12.8) black;13.7(13.6-13.9) black;15.2 (14.8-15.7) black;
10.4(9.6-11.2)12.5(12.2-12.8)(13.4-14.1) Mexican(15.4-16.3) Mexican(12.1-12.6) Mexican13.1 (12.9-13.3)14.0(13.8-14.3)15.7(15.4-16.1)
Mexican AmericanMexican AmericanAmericanAmericanAmericanMexican AmericanMexican AmericanMexican American
NHANES III Sun etal4610.03 (9.61-10.40)12.32 (12.00-12.67) white;13.52 (13.22-13.83) white;16.01 (15.57-16.50) white;11.98 (11.69-12.29) white;12.65 (12.37-12.95) white;13.56 (13.27-13.86) white;15.67 (15.30-16.05) white;
(2002)hwhite; 9.20 (8.62-11.78 (11.50-12.08)13.40 (13.15-13.66) black;15.00 (14.70-15.32) black;11.16 (10.89-11.43) black;12.51 (12.26-12.77)13.73 (13.49-13.99)15.32 (14.99-15.67)
9.64) black; 10.29black; 12.53 (12.29-13.77 (13.51-14.03)15.76(15.39-16.14)12.30 (12.06-12.56)black; 13.06 (12.79-black; 14.08black; 15.75
(9.94-10.60) Mexican American12.79) Mexican AmericanMexican AmericanMexican AmericanMexican American13.36) Mexican American(13.83-14.32) Mexican American(15.46-16.03) Mexican American
NHANES III; Sun et al65 (2005)ND12.44(11.73-12.84) white; 12.37 (11.82-12.70) black; 12.56 (12.34-12.80) Mexican American13.49(13.12-13.81) white; 13.46 (13.10-13.75) black; 13.76 (13.52-14.01) Mexican American15.83 (15.38-16.36) white; 14.86(14.38-15.31) black; 15.60 (15.23-16.02) Mexican AmericanND12.55 (11.95-12.93) white; 12.69 (12.27-12.99) black; 13.08(12.84-13.33) Mexican American13.48(13.12-13.79) white; 13.79(13.45-14.09) black; 14.08 (13.85-14.31)
Mexican American
15.59 (15.23-15.96) white; 15.21 (14.71-15.71) black; 15.79 (15.49-16.11)
Mexican American
  • Cl, confidence interval.

  • a Means and medians are considered comparable values because the ages for various pubertal markers are typically normally distributed.

  • b See references for details.

  • c Reynolds and Wines69 definitions of G stages differ from Tanner G stages (see Table 4 footnote b). Their G3 mean age is not shown here because it was defined differently from the other studies.

  • d Nicolson and Hanley14 used a 5-stage “sex stage” system with assessment of pubic hair and genital development; genital stage descriptions were similar to those of Tanner and are reported here as G2 to G5, but comparability with other studies that used the Tanner stage definitions is a concern.

  • e Foster etal61 only presented median ages for transition into G2 and PH 2 because of the “limited age range,” 5 to 14 years, of their population.

  • f Villarreal etal64 calculated percentages of boys in a given stage by age, means for being in a stage, means (from probit analysis), and medians (from Spearrnan-Karber analysis) for entry into a stage. Means for entry into a stage are presented in this table.

  • g Biro etal25 defined a PS1: “PS 1 was defined as the absence of pubic hair and a testicular volume of the larger testis <3 rnl_.” Their PS2 was similar to Tanner’s PH2. Data for comparable Tanner PH stages are presented here. PS1 data are not presented here. Data were not presented by race.

  • h Sun et al45 calculated means for “age in a stage” and medians for “age at entry” into a stage. Medians are reported here for comparison with other studies that looked at age ofattainrnent.