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. 2012 Oct 4;16(11):2005–2013. doi: 10.1017/S1368980012004338

Table 5.

Comparison between methods used to define weight status – weighted kappa (κ w), 95 % confidence interval and interpretation according to Landis and Koch( 31 ): children and adolescents (n 1519), KwaZulu-Natal, South Africa

Boys Girls
κ w 95 % CI Interpretation( 31 ) κ w 95 % CI Interpretation( 31 )
WHO BAZ( 24 )/Cole-IOTF BAZ( 27 , 29 )
Grade 1 (age 7 years) 0·41 0·19, 0·62 Fair 0·54 0·39, 0·69 Moderate
Grade 5 (age 11 years) 0·65 0·54, 0·76 Substantial 0·61 0·42, 0·79 Moderate
Grade 9 (age 15 years) 0·66 0·46, 0·86 Substantial 0·80 0·72, 0·88 Substantial
WHO BAZ( 24 )/body fat %( 30 )
Grade 1 (age 7 years) 0·34 0·20, 0·48 Fair 0·42 0·23, 0·61 Moderate
Grade 5 (age 11 years) 0·27 0·11, 0·44 Fair 0·44 0·29, 0·58 Moderate
Grade 9 (age 15 years) 0·13 0·06, 0·20 Slight 0·68 0·54, 0·81 Substantial
Cole-IOTF BAZ( 27 , 29 )/body fat %( 30 )
Grade 1 (age 7 years) 0·27 0·09, 0·45 Fair 0·51 0·39, 0·63 Moderate
Grade 5 (age 11 years) 0·38 0·24, 0·52 Fair 0·62 0·45, 0·79 Substantial
Grade 9 (age 15 years) 0·24 0·03, 0·46 Fair 0·70 0·55, 0·86 Substantial
WHO BAZ( 24 )/NCHS/WHO WAZ( 25 )
Grade 1 (age 7 years) 0·42 0·30, 0·53 Moderate 0·49 0·36, 0·61 Moderate
Grade 5 (age 11 years) 0·41 0·24, 0·59 Moderate 0·52 0·35, 0·69 Moderate
Grade 9 (age 15 years) 0·39 0·23, 0·55 Fair 0·49 0·34, 0·65 Moderate
Cole-IOTF BAZ( 27 , 29 )/NCHS/WHO WAZ( 25 )
Grade 1 (age 7 years) 0·34 0·12, 0·57 Fair 0·35 0·21, 0·50 Fair
Grade 5 (age 11 years) 0·42 0·22, 0·62 Moderate 0·44 0·23, 0·65 Moderate
Grade 9 (age 15 years) 0·55 0·31, 0·78 Moderate 0·49 0·45, 0·53 Moderate
Body fat %( 30 )/NCHS/WHO WAZ( 25 )
Grade 1 (age 7 years) 0·32 0·08, 0·56 Fair 0·39 0·17, 0·62 Fair
Grade 5 (age 11 years) 0·15 0·003, 0·30 Slight 0·28 0·16, 0·39 Fair
Grade 9 (age 15 years) 0·15 0·09, 0·22 Slight 0·44 0·27, 0·61 Moderate

BAZ, BMI-for-age Z-score; IOTF, International Obesity Taskforce; NCHS, National Center for Health Statistics; WAZ, weight-for-age Z-score.