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. 2019 Jul 12;92(1101):20190143. doi: 10.1259/bjr.20190143

Table 2.

Variability ICC values for quadriceps, hamstrings and combined measures in both muscle groups

Test–retest FF MD FA λ1 λ 2 λ 3
Hamstrings 0.99
(0.96, 1)		 0.92
(0.8, 0.97)		 0.84
(0.63, 0.94)		 0.72
(0.39, 0.89)		 0.93
(0.83, 0.97)		 0.85
(0.64, 0.94)
Quadriceps 0.98
(0.94, 0.99)		 0.88
(0.70, 0.95)		 0.88
(0.71, 0.95)		 0.73
(0.40, 0.89)		 0.94
(0.84, 0.98)		 0.85
(0.64, 0.94)
Both 0.99
(0.98, 1)		 0.94
(0.84, 0.97)		 0.89
(0.74, 0.96)		 0.85
(0.64, 0.94)		 0.96
(0.89, 0.98)		 0.88
(0.71, 0.95)
Mean bias 0.07
(−0.24, 0.38)		 0.02
(−0.023, 0.026)		 0.02
(−0.020, 0.025)		 0.07
(−0.03, 0.04)		 0.00
(−0.03, 0.03)		 −0.02
(−0.04, 0.04)
Inter rater
Hamstrings 0.96
(0.91, 0.99)		 0.96
(0.90, 0.98)		 0.98
(0.96, 1)		 0.90
(0.76, 0.96)		 0.99
(0.97, 1)		 1
(0.98, 1)
Quadriceps 0.99
(0.98, 1)		 1
(0.99, 1)		 0.99
(0.98, 1)		 1
(0.99, 1)		 1
(0.99, 1)		 0.98
(0.96, 0.99)
Both 0.97
(0.93, 0.99)		 0.99
(0.97,1)		 0.99
(0.98, 1)		 0.98
(0.95,0.99)		 1
(0.99,1)		 0.99
(0.98, 1)
Mean bias −0.09
(−0.60, 0.42)		 −0.013
(−0.010, 0.007)		 −0.001
(−0.010, 0.007		 −0.005
(−0.03, 0.02)		 −0.001
(−0.01, 0.01)		 0.00
(−0.01, 0.01)
Intra - rater
Hamstrings 0.99
(0.94, 1)		 0.94
(0.84, 0.98)		 0.99
(0.98, 1)		 0.90
(0.76, 0.96)		 0.98
(0.95, 0.99)		 0.98
(0.95, 0.99)
Quadriceps 0.99
(0.98, 1)		 0.88
(0.72, 0.96)		 0.96
(0.90, 0.98)		 0.90
(0.76, 0.96)		 0.96
(0.90, 0.98)		 0.98
(0.95, 0.99)
Both 0.99
(0.96, 1)		 0.93
(0.85, 0.97)		 0.99
(0.97, 0.99)		 0.64
(0.29, 0.84)		 0.98
(0.96, 0.99)		 0.99
(0.98, 1)
Mean bias 0.10
(−0.17, 0.36)		 −0.003
(−0.035, 0.029)		 −0.001
(−0.012, 0.009)		 0.01
(−0.16, 0.18)		 −0.001
(−0.02, 0.02)		 −0.001
(−0.01, 0.01)

FA, fractional anisotropy; FF, fat fraction; ICC, intraclass correlation coefficient; MD, mean diffusivity.