| No-LBP group | CLBP group | Mean difference (95% CI) between groups | |||||
---|---|---|---|---|---|---|---|---|
Characteristic | male | female | gender mean difference (95% CI) | male | female | gender mean difference (95% CI) | Male | female |
N (%) | 17 (40.5) | 25 (59.5) | Â | 11 (37.9) | 18 (62.1) | Â | Â | Â |
Age (years) | 35.8 (14.0) | 36.2 (12.0) | -0.3 (-8.5,7.8) | 36.2 (15.4) | 34.7 (14.3) | 1.5 (-10.1, 13.0) | -0.4 (-11.9, 11.2) | 1.4 (-6.7, 9.6) |
Height (cm) | 179.3 (7.1) | 163.4 (7.7) | 15.9 (11.6, 20.6)* | 177.6 (4.4) | 165.1 (6.0) | 12.5 (8.2, 16.8)* | 1.7 (-3.2, 6.6) | -1.7 (-6.1, 2.7) |
Mass (kg) | 79.1 (13.1) | 61.8 (10.4) | 17.3 (10.0, 24.6)* | 81.3 (8.1) | 66.3 (9.1) | 15.0 (8.1, 21.9)* | -2.2 (-11.3, 6.9) | -4.5 (-10.7, 1.6) |
BMI (kg/m2) | 24.5 (3.1) | 23.1 (3.0) | 1.4 (-0.5, 3.4) | 25.8 (2.7) | 24.3 (3.0) | 1.5 (-0.8, 3.8) | -1.3 (-3.6, 1.1) | -1.2 (-3.1, 0.6) |
Hip girth (cm) | 98.4 (7.2) | 96.1 (9.3) | 2.3 (-3.1, 7.7) | 101.3 (6.2) | 100.4 (7.1) | 0.9 (-4.5, 6.2) | -2.8 (-8.2, 2.6) | -4.3 (-9.5, 1.0) |
Waist girth (cm) | 84.4 (8.6) | 73.2 (10.3) | 11.2 (5.2, 17.4)* | 86.6 (8.5) | 76.2 (9.3) | 10.4 (3.3, 17.4)* | -2.3 (-9.0, 4.6) | -3.1 (-9.3, 3.1) |
Back muscle endurance (sec) [range 0-360] | 188.8 (49.9) | 216.4 (92.6) | -27.6 (-77.4, 22.2) | 165.3 (51.9) | 148.6 (72.9) | 16.7 (-35.1, 68.4) | 23.5 (-16.8, 63.8) | 67.8 (14.7, 120.8)* |
DASS-21 depression [range 0-21] | 2.1 (3.8) | 2.8 (5.6) | -0.7 (-3.9, 2.4) | 4.2 (6.7) | 2.1 (2.4) | 2.2 (-1.4, 5.7) | -2.2 (-6.3, 1.9) | 0.7 (-2.1, 3.6) |
DASS-21 anxiety [range 0-21] | 1.8 (2.3) | 2.5 (4.6) | -0.7 (-3.2, 1.7) | 2.9 (2.7) | 3.1 (3.4) | -0.2 (-2.7, 2.3) | -1.1 (-3.1, 0.8) | -0.6 (-3.2, 1.9) |
DASS-21 stress [range 0-21] | 8.7 (7.4) | 10.1 (7.0) | -1.4 (-5.9, 3.2) | 6.5 (6.2) | 8.8 (4.9) | -2.2 (-6.5, 2.0) | 2.2 (-3.4, 7.7) | 1.3 (-2.6, 5.2) |
Days/week of vigorous physical activity (days) [range 0-7] | 4.1 (1.9) | 3.4 (3.4) | 0.8 (-0.3, 1.8) | 3.6 (2.3) | 3.1 (1.4) | 0.4 (-1.0, 1.8) | 0.6 (-1.1, 2.2) | 0.2 (-0.7, 1.2) |
ODI (%) | Â | Â | Â | 16.2 (8.7) | 15.4 (9.1) | 0.7 (-6.3, 7.8) | Â | Â |
LBP history (yrs) | Â | Â | Â | 13.3 (10.4) | 11.6 (9.9) | 1.8 (-6.1, 9.7) | Â | Â |
Intensity of LBP in last week; median (IQR) | Â | Â | Â | 4 (2) | 5 (3) | Â | Â | Â |
Episodes LBP last year; n (%) | Â | Â | Â | Â | Â | Â | Â | Â |
1-3 | Â | Â | Â | 0 (0) | 0 (0) | Â | Â | Â |
4-10 | Â | Â | Â | 3 (27.3) | 8 (44.4) | Â | Â | Â |
> 10 | Â | Â | Â | 8 (72.7) | 10 (55.6) | Â | Â | Â |
Work days missed with last year; n (%) | Â | Â | Â | Â | Â | Â | Â | Â |
0 | Â | Â | Â | 9 (81.8) | 12 (66.7) | Â | Â | Â |
1-2 | Â | Â | Â | 2 (18.2) | 3 (16.7) | Â | Â | Â |
3-7 | Â | Â | Â | Â | 3 (16.7) | Â | Â | Â |
Interference with normal activities; % reporting 'yes' | Â | Â | Â | 5 (45.5) | 8 (44.4) | Â | Â | Â |
Interference with recreational activities; % reporting 'yes' | Â | Â | Â | 6 (54.5) | 8 (44.4) | Â | Â | Â |
Currently taking analgesic medication; % reporting 'yes' | 8 (19.0) | 19 (45.2) | Â | 8 (27.6) | 12 (41.4) | Â | Â | Â |
Currently taking NSAID medication; % reporting 'yes' | 0 (0) | 1 (2.4) | Â | 2 (6.9) | 2 (6.9) | Â | Â | Â |
PA L3 BMC (g) | 20.89 (3.39) | 16.72 (3.24) | 4.17 (2.05, 6.28)* | 20.03 (1.93) | 16.46 (3.55) | 3.56 (1.17, 5.96)* | 0.86 (-1.46, 3.18) | 0.26 (-1.87, 2.38) |
PA L3 aBMD (g/cm2) | 1.13 (0.13) | 1.08 (0.14) | 0.48 (-0.04, 0.14) | 1.11 (0.11) | 1.10 (0.19) | 0.02 (-0.12, 0.15) | 0.02 (-0.08, 0.12) | -0.01 (-0.12, 0.09) |
PA total spine BMC (g) | 79.07 (12.33) | 61.30 (13.05) | 17.77 (9.66, 25.88)* | 75.79 (8.39) | 63.50 (13.98) | 12.30 (2.70, 21.88)* | 3.28 (-5.46, 12.01) | -2.20 (-10.59, 6.19) |
PA total spine aBMD (g/cm2) | 1.15 (0.12) | 1.04 (0.14) | 0.06 (-0.02, 0.15) | 1.08 (0.10) | 1.06 (0.18) | 0.02 (-0.11, 0.14) | 0.03 (-0.06, 0.12) | -0.02 (-0.12, 0.08) |
PA total spine T-score | 0.08 (1.28) | -0.06 (1.27) | 0.14 (-0.75, 1.03) | -0.08 (0.99) | 0.32 (1.63) | -0.40 (-1.66, 0.86) | 0.15 (-0.90, 1.21) | -0.38 (-1.35, 0.58) |
Lateral L3 BMC (g) | 9.42 (1.89) | 7.80 (1.74) | 1.62 (0.45, 2.79)* | 8.71 (1.54) | 8.36 (1.64) | 0.35 (-0.93, 1.62) | 0.72 (-0.69, 2.12) | -0.56 (-1.66, 0.54) |
Lateral L3 aBMD (g/cm2) | 0.82 (0.13) | 0.77 (0.11) | 0.06 (-0.02, 0.14) | 0.74 (0.12) | 0.78 (0.10) | -0.04 (-0.12, 0.04) | 0.08 (-0.02, 0.18) | -0.02 (-0.08, 0.05) |
Lateral L3 ap.vBMD (g/cm3) | 0.21 (0.03) | 0.22 (0.03) | -0.01 (-0.03, 0.01) | 0.20 (0.03) | 0.23 (0.02) | -0.03 (-0.06, -0.01) | 0.02 (-0.01, 0.04) | -0.01 (-0.02, 0.01) |