Table 3. Percent Agreement, Kappa, and Weighted Kappa as Measures of Concordance in Self and Maternal Reports of Adolescents' General Health, NLSY97.

	Total	Female Adolescents	Male Adolescents
Total
Percent agreementa	48.04%	48.74%	47.35%
Kappab	0.22	0.25	0.19
Weighted kappa 1c (.67, .33)	0.29	0.32	0.25
Weighted kappa 2d (.89, .56)	0.35	0.39	0.31
White adolescents
Percent agreement	50.03%	51.91%	48.23%
Kappa	0.22	0.27	0.17
Weighted kappa 1 (.67, .33)	0.28	0.34	0.22
Weighted kappa 2 (.89, .56)	0.35	0.42	0.28
Black adolescents
Percent agreement	45.71%	44.72%	46.69%
Kappa	0.21	0.21	0.22
Weighted kappa 1 (.67, .33)	0.26	0.26	0.27
Weighted kappa 2 (.89, .56)	0.32	0.31	0.33
Hispanic adolescents
Percent agreement	45.86%	45.89%	45.82%
Kappa	0.22	0.23	0.20
Weighted kappa 1 (.67, .33)	0.29	0.31	0.27
Weighted kappa 2 (.89, .56)	0.36	0.39	0.33

NLSY97 = National Longitudinal Study of Youth 1997 Cohort

^aPercent agreement and each measure of kappa are not weighted using the nationally representative weights from the NLSY.

^bAll cells off of diagonal are unweighted, such that any disagreement is treated the same.

^cWeighted kappa takes into account levels of disagreement. One cell off of diagonal is weighted .67, two cells off is .33, three cells off is 0.

^dOne cell off of diagonal is weighted .89, two cells off is .56, three cells off is 0.