Table 2.

Comparison of average OKS between the CAS and STA groups

		No. of OKS assessments	Mean & range	SD	p value (t-test)
1 year	STA	246	25.84 (12–59)	9.82	0.72
	CAS	188	24.43 (12–54)	9.05
2 years	STA	166	24.89 (12–58)	9.88	0.62
	CAS	123	24.48 (12–53)	9.25
3 years	STA	102	24.51 (12–49)	9.69	0.33
	CAS	77	25.66 (12–52)	10.37
4 years	STA	51	24.26 (12–57)	10.67	0.97
	CAS	33	24.18 (12–45)	9.07
5 years	STA	15	25.21 (12–48)	10.85	0.66
	CAS	13	26.9 (12–45)	9.26