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Asymptomatic (n = 57) Symptomatic (n = 52) Difference Mean Std Dev Mean Std Dev Mean Std Dev Age (yrs) 48 11 53 13 5 2 Height (in) 65.6 6.1 63.8 6.4 1.8 0.3 Weight (lbs) 168 29 176 32 8 3 BMI (lbs/in2) 26.6 4.7 30.2 4.9 3.6 0.2 Panel A. Columns I-III report means and standard deviations of intervertebral rotation by level in asymptomatic individuals; columns IV-V report the differences in means and standard deviations of intervertebral rotation by level.
[I] [II] [III] [IV] [V] SBR VMA (Standing) VMA (Lying) Δ SBR-VMA (Standing) Δ SBR-VMA (Lying) Level Mean Std Dev Mean Std Dev Mean Std Dev Mean Std Dev Mean Std Dev L1-L2 7.6 4.3 8.6 3.6 5.9 2.3 1.0 0.7 1.7** 2*** L2-L3 11.2 4.8 10.1 3.7 6.8 2.4 1.1 1.1** 4.4*** 2.4*** L3-L4 10.1 5.1 9.2 4.1 7.7 2.6 0.9 1** 2.4*** 2.5*** L4-L5 11.9 7.1 8.3 4.4 9.1 3.3 3.6** 2.7*** 2.8*** 3.8*** L5-S1 8.1 6.2 10.3 4.6 8.5 4.2 -2.2* 1.6*** -0.4 2** Average 9.8 5.5 9.3 4.1 7.6 3.0 0.5 1.4** 2.2*** 2.5*** Panel B. Columns I-III report means and standard deviations of intervertebral rotation by level in symptomatic individuals; columns IV-V report the differences in means and standard deviations of intervertebral rotation by level.
[I] [II] [III] [IV] [V] SBR VMA (Standing) VMA (Lying) Δ SBR-VMA (Standing) Δ SBR-VMA (Lying) Level Mean Std Dev Mean Std Dev Mean Std Dev Mean Std Dev Mean Std Dev L1-L2 6.7 4.8 6.4 3.3 5.4 2.4 0.3 1.5** 1.3* 2.4*** L2-L3 7.1 5.0 8.9 3.1 6.2 2.3 -1.8* 1.9*** 0.9 2.7*** L3-L4 7.6 5.5 10.0 3.7 6.9 2.5 -2.4* 1.7** 0.7 3.0*** L4-L5 6.8 6.2 9.3 3.0 8.7 3.1 -2.5** 3.2*** -1.9* 3.1*** L5-S1 7.4 4.7 3.8 2.1 7.9 4.3 3.6** 2.6*** -0.5 0.5 Average 7.1 5.2 7.7 3.1 7.0 2.9 -0.6 2.2*** 0.1 2.3*** Panel A. Columns I-III report means and standard deviations of intervertebral rotation by level in asymptomatic individuals; columns IV-V report the differences in means and standard deviations of intervertebral rotation by level.
[I] [II] [III] [IV] [V] SBR VMA (Standing) VMA (Lying) Δ SBR-VMA (Standing) Δ SBR-VMA (Lying) Level Mean Std Dev Mean Std Dev Mean Std Dev Mean Std Dev Mean Std Dev L1-L2 6.5 4.2 8.1 2.9 6.2 2.3 -1.6** 1.3*** 0.3 1.9*** L2-L3 9.7 4.6 9.6 2.8 9.0 2.2 0.1 1.8*** 0.7 2.4*** L3-L4 10.2 4.6 10.1 3.2 9.8 2.9 0.1 1.4*** 0.4 1.7*** L4-L5 7.2 4.2 8.6 3.8 9.2 3.2 -1.4** 0.4 -2*** 1** L5-S1 1.9 1.6 3.1 1.6 3.8 2.2 -1.2* 0.0 -1.9** -0.6 Average 7.1 3.8 7.9 2.9 7.6 2.6 -0.8 1.0*** -0.5 1.3*** Panel B. Columns I-III report means and standard deviations of intervertebral rotation by level in symptomatic individuals; columns IV-V report the differences in means and standard deviations of intervertebral rotation by level.
[I] [II] [III] [IV] [V] SBR VMA (Standing) VMA (Lying) Δ SBR-VMA (Standing) Δ SBR-VMA (Lying) Level Mean Std Dev Mean Std Dev Mean Std Dev Mean Std Dev Mean Std Dev L1-L2 5.7 3.8 8.0 3.0 7.0 2.4 -2.3** 0.8* -1.3* 1.4** L2-L3 7.8 4.1 9.7 2.8 8.4 2.7 -1.9* 1.3** -0.6 1.4** L3-L4 9.4 4.7 10.4 3.2 9.1 3.1 -1.0 1.5** 0.3 1.6*** L4-L5 6.9 3.8 8.5 3.8 8.2 2.5 -1.6* 0.0 -1.3* 1.3** L5-S1 2.4 1.3 2.9 1.4 3.9 2.8 -0.5 - 0.1 -1.5* 1.5** Average 6.4 3.5 7.9 2.8 7.3 2.7 -1.5* 0.7* -0.9 1.4** Panel A. % change in flexion/extension bending
% Change: VMA (Standing)/SBR % Change: VMA (Lying)/SBR Level Mean Std Dev Mean Std Dev L1-L2 13% -16% -22% -47% L2-L3 -10% -23% -39% -50% L3-L4 -9% -20% -24% -49% L4-L5 -30% -38% -24% -54% L5-S1 27% -26% 5% -32% Average -5% -26% -22% -46% Panel B. % change in left/right lateral bending
% Change: VMA (Standing)/SBR % Change: VMA (Lying)/SBR Level Mean Std Dev Mean Std Dev L1-L2 25% -31% -5% -45% L2-L3 -1% -39% -7% -52% L3-L4 -1% -30% -4% -37% L4-L5 19% -10% 28% -24% L5-S1 63% 0% 100% 38% Average 11% -26% 7% -33% Panel A. % change in flexion/extension bending.
% Change: VMA (Standing)/SBR % Change: VMA (Lying)/SBR Level Mean Std Dev Mean Std Dev L1-L2 -5% -31% -19% -50% L2-L3 25% -38% -12% -54% L3-L4 32% -31% -9% -54% L4-L5 37% -51% 27% -49% L5-S1 -49% -56% 7% -10% Average 8% -41% -1% -44% Panel B. % change in left/right lateral bending
% Change: CCBR (Standing)/SBR % Change: CCBR (Lying)/SBR Level Mean Std Dev Mean Std Dev L1-L2 40% -21% 23% -36% L2-L3 25% -31% 8% -34% L3-L4 11% -33% -3% -35% L4-L5 23% -1% 19% -35% L5-S1 21% 5% 62% 116% Average 23% -20% 14% -24%