| Model 1: Unconditional growth model (n = 347) | Model 2: Effects of Type of leg paina and SBSTb outcome UNadjusted (n = 347) | Model 3: Effects of Type of leg pain and SBST outcome adjustedc (n = 347) | ||||||
---|---|---|---|---|---|---|---|---|---|
Characteristic | Betag | 95% CId | p-value | Betag | 95% CId | p-value | Betag | 95% CId | p-value |
ODI at BL | 22 | 20, 23 | < 0.001 | 12 | 9.9, 15 | < 0.001 | 12 | 9.4, 15 | < 0.001 |
SBST category | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 Low |  |  |  | — | — |  | — | — |  |
 Mediume |  |  |  | 12 | 8.9, 15 | < 0.001 | 11 | 7.8, 14 | < 0.001 |
 High |  |  |  | 23 | 18, 27 | < 0.001 | 22 | 17, 27 | < 0.001 |
Type leg pain | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 LBP |  |  |  | — | — |  | — | — |  |
 Referredf |  |  |  | 2.7 | -0.13, 5.6 | 0.061 | 2.5 | -0.64, 5.7 | 0.12 |
 Radicular |  |  |  | 12 | 6.4, 18 | < 0.001 | 15 | 9.0, 22 | < 0.001 |
linear change during first 6 months | -6.3 | -7.1, -5.6 | < 0.001 | -3.6 | -5.0, -2.2 | < 0.001 | -2.2 | -3.7, -0.67 | 0.005 |
SBST category * linear change during first 6 months | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 Medium * linear change during first 6 months |  |  |  | -5.0 | -6.6, -3.3 | < 0.001 | -6.2 | -8.0, -4.4 | < 0.001 |
 High * linear change during first 6 months |  |  |  | -7.0 | -9.7, -4.3 | < 0.001 | -9.2 | -12, -6.3 | < 0.001 |
Type leg pain * linear change during first 6 months | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 Referred * linear change during first 6 months |  |  |  | -0.05 | -1.7, 1.6 | > 0.9 | -0.34 | -2.1, 1.4 | 0.7 |
 Radicular * linear change during first 6 months |  |  |  | 0.03 | -3.3, 3.4 | > 0.9 | -1.3 | -4.9, 2.3 | 0.5 |
quadratic change during first 6 months | 0.72 | 0.60, 0.83 | < 0.001 | 0.41 | 0.20, 0.62 | < 0.001 | 0.23 | 0.00, 0.45 | 0.053 |
SBST category * quadratic change during first 6 months | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 Medium * quadratic change during first 6 months |  |  |  | 0.64 | 0.39, 0.89 | < 0.001 | 0.80 | 0.52, 1.1 | < 0.001 |
 High * quadratic change during first 6 months |  |  |  | 0.75 | 0.34, 1.2 | < 0.001 | 1.1 | 0.62, 1.5 | < 0.001 |
Type leg pain * quadratic change during first 6 months | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 Referred * quadratic change during first 6 months |  |  |  | -0.02 | -0.27, 0.23 | 0.9 | 0.01 | -0.26, 0.28 | > 0.9 |
 Radicular * quadratic change during first 6 months |  |  |  | -0.16 | -0.67, 0.35 | 0.5 | -0.04 | -0.59, 0.51 | 0.9 |
difference between ODI at 6 and 12 months | -1.5 | -2.9, -0.22 | 0.023 | -1.9 | -4.2, 0.44 | 0.11 | -2.5 | -5.1, 0.08 | 0.058 |
SBST category * difference between ODI at 6 and 12 months | Â | Â | Â | Â | Â | Â | Â | Â | |
 Medium * difference between ODI at 6 and 12 months |  |  |  | 0.38 | -2.5, 3.2 | 0.8 | 1.1 | -2.1, 4.3 | 0.5 |
 High * difference between ODI at 6 and 12 months |  |  |  | 3.8 | -0.93, 8.5 | 0.12 | 5.7 | 0.64, 11 | 0.027 |
Type leg pain * difference between ODI at 6 and 12 months | Â | Â | Â | Â | Â | Â | Â | Â | |
 Referred * difference between ODI at 6 and 12 months |  |  |  | -0.18 | -3.0, 2.6 | 0.9 | 0.03 | -3.0, 3.1 | > 0.9 |
 Radicular * difference between ODI at 6 and 12 months |  |  |  | -1.5 | -7.6, 4.7 | 0.6 | -1.9 | -8.6, 4.7 | 0.6 |
random intercept (sd) | 12 | Â | Â | 9.5 | Â | Â | 9.4 | Â | Â |
correlation random effects | -0.72 | Â | Â | -0.64 | Â | Â | -0.67 | Â | Â |
random linear slope (sd) | 1.5 | Â | Â | 1.4 | Â | Â | 1.4 | Â | Â |
residuals (sd) | 8.7 | Â | Â | 8.6 | Â | Â | 8.4 | Â | Â |
AIC | 12,82 | Â | Â | 12,47 | Â | Â | 10,39 | Â | Â |
BIC | 12,86 | Â | Â | 12,60 | Â | Â | 10,64 | Â | Â |