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Table 4 Inter-rater and Intra-rater reliability (Intraclass Correlation Coefficients using mean of repetitions 2–5)

From: How consistent are lordosis, range of movement and lumbo-pelvic rhythm in people with and without back pain?

Interrater NoLBP subjects LBP subjects
  n = T12 angle Pelvic angle Lumbar ROM n = T12 angle Pelvic angle Lumbar ROM
Flexion 32 .98 (.96 to .99) .97 (.94 to .99) .80 (.56 to .91) 32 .96 (.92 to .98) .92 (.84 to .96) .95 (.90 to .98)
Extension 31 .88 (.74 to .94) .87 (.72 to .93) .91 (.81 to .96) 28 .95 (.90 to .98) .77 (.52 to .89) .94 (.87 to .97)
Lordosis 33 .83 (.65 to .91) .91 (.83 to .96) .90 (.79 to .95) 32 .83 (.65 to .92) .91 (.81 to .96) .94 (.87 to .97)
Lateral Flexion left 33 .88 (.76 to .94) .89 (.77 to .94) .84 (.68 to .92) 32 .89 (.76 to .94) .79 (.56 to .90) .89 (.78 to .95)
Lateral flexion right 33 .94 (.88 to .97) .88 (.72 to .95) .92 (.84 to .96) 32 .82 (.64 to .91) .67 (.33 to .83) .89 (.79 to .95)
Intrarater NoLBP subjects LBP subjects
Flexion 28 .97 (.93 to .99) .95 (.90 to .98) .86 (.68 to .94) 25 .95 (.89 to .98) .86 (.69 to .94) .86 (.69 to .94)
Extension 28 .84 (.64 to .92) .71 (.38 to .86) .79 (.54 to .90) 21 .94 (.88 to .98) .67 (.25 to .86) .94 (.87 to .97)
Lordosis 30 .71 (.40 to .86) .84 (.68 to .93) .81 (.59 to .91) 25 .89 (.74 to .95) .82 (.60 to .92) .85 (.65 to .93)
Lateral Flexion left 30 .77 (.53 to .89) .85 (.69 to .93) .76 (.49 to .89) 25 .92 (.82 to .96) .83 (.61 to .92) .92 (.81 to .96)
Lateral flexion right 30 .95 (.90 to .98) .88 (.75 to .94) .89 (.77 to .95) 25 .85 (.46 to .94) .70 (.34 to .87) .92 (.68 to .97)
  1. Legend: ROM = ROM Intraclass correlation co-efficients (ICC 2,2) and 95 % confidence intervals