Table 3.

Sensitivity, Specificity, Positive Predictive Value (PPV), and Negative Predictive Value (NPV) of Self-Assessed Pubertal Onset (Girls n=131, Boys n=114).

Girls: Tanner Stage >1 for Breast Development
	Physician
Self	yes	no	total	Sensitivity	Specificity	PPV	NPV
yes	42	28	70	0.93	0.67	0.60	0.95
no	3	58	61
total	45	86	131
Girls: Tanner Stage >1 for Pubic Hair Development
	Physician
Self	yes	no	total	Sensitivity	Specificity	PPV	NPV
yes	34	7	41	1	0.93	0.83	1
no	0	90	90
total	34	97	131
Boys: Tanner Stage >1 for Genital Development
	Physician
Self	yes	no	total	Sensitivity	Specificity	PPV	NPV
yes	54	44	98	0.93	0.21	0.55	0.75
no	4	12	16
total	58	56	114
Boys: Tanner Stage >1 for Pubic Hair Development
	Physician
Self	yes	no	total	Sensitivity	Specificity	PPV	NPV
yes	20	7	27	0.95	0.92	0.74	0.99
no	1	86	87
total	21	93	114