Table 5.

Prevalence and four types of different kappa statistics for calculating frontal plane postural orientation, 7 ^th grade (n= 37)

7 th grade	Prevalence (score 1–3)	Kappa	PABAK	Linear weighted kappa	Quadratic weighted kappa
Right ankle	0.13	0.63	0.62	0.60	0.76
- knee	0.37	0.58	0.58	0.54	0.69
- hip	0.47	0.63	0.63	0.61	0.69
- trunk	0.08	0.56	0.78	0.73	0.86
Left ankle	0.26	0.53	0.56	0.61	0.80
- knee	0.34	0.47	0.46	0.66	0.82
- hip	0.47	0.47	0.46	0.70	0.83
- trunk	0.08	0.54	0.78	0.77	0.91