Table 2 Study characteristics and selected COP parameters measured in people with NSNP
Study | Condition | Duration (sec) | Number of trials | Parameter | Neck pain Result (SD) | Healthy controls Result (SD) | p value |
|---|---|---|---|---|---|---|---|
McPartland et al. [18] | normal stance EO/EC/F | 30 | 6 | absolute | EO/F: 4.2 | EO/F: 3.3 | p < 0.05 |
sway Vel † | EC/F: 4.3 | EC/F: 3.4 | ns | ||||
narrow stance EO/EC/F | 30 | 6 | absolute | EO/F: 4.4 | EO/F: 3.7 | ns | |
sway Vel † | EC/F: 5.3 | EC/F: 4.4 | ns | ||||
Michaelson et al. [21] | narrow stance, EO/EC/F | 20 | 1 | sway area (mm2) | EO: 105 (73) | EO: 66 (47) | - |
EC: 166 (117) | EC: 109 (65) | - | |||||
Madeleine et al. [23]∞ | narrow stance, EO/F | 45 | 1 | displacement ampl. AP (mm) | EO: ~2.7 * | EO: ~2.1 | - |
displacement ampl. ML (mm) | EO: ~1.7 * | EO: ~1.0 | - | ||||
Field et al. [22]∞ | normal stance EO/EC/F/C | 30 | 1 | AP RMS amplitude (mm) | EO/F: ~1.3 | EO/F: ~1.2 | ns |
EC/F: ~1.4 | EC/F: ~1.1 | p < 0.05 | |||||
EO/C: ~2.2 | EO/C: ~2.3 | ns | |||||
EC/C: ~2.5 | EC/C: ~2.4 | ns | |||||
ML RMS amplitude (mm) | EO/F: ~2.6 | EO/F: ~2.4 | ns | ||||
EC/F: ~3.4 | EC/F: ~2.8 | ns | |||||
EO/C: ~4.1 | EO/C: ~4.1 | ns | |||||
EC/C: ~6.2 | EC/C: ~5.6 | ns | |||||
narrow stance, EO/EC/F/C | 30 | 1 | AP RMS amplitude (mm) | EO/F: ~3.3 | EO/F: ~3.1 | ns | |
EC/F: ~4.5 | EC/F: ~4.0 | ns | |||||
EO/C: ~4.5 | EO/C: ~4.4 | ns | |||||
EC/C: ~7.6 | EC/C: ~6.9 | ns | |||||
ML RMS amplitude (mm) | EO/F: ~5.2 | EO/F: ~5.1 | ns | ||||
EC/F: ~6.5 | EC/F: ~5.6 | p < 0.05 | |||||
EO/C: ~6.1 | EO/C: ~6.0 | ns | |||||
EC/C: ~9.0 | EC/C: ~8.2 | ns | |||||
Poole et al. [24] ∞ | normal stance, EC/EO/F/C | 30 | 1 | AP RMS amplitude (mm) | EO/F: ~2.3 | EO/F: ~3.1 | ns |
EC/F: ~5.0 | EC/F: ~3.0 | p = 0.02 | |||||
EO/C: ~5.8 | EO/C: ~4.2 | p = 0.01 | |||||
EC/C: ~7.5 | EC/C: ~6.2 | ns | |||||
30 | 1 | ML RMS amplitude (mm) | EO/F: ~1.7 | EO/F: ~1.8 | ns | ||
EC/F: ~1.9 | EC/F: ~1.6 | ns | |||||
EO/C: ~3.8 | EO/C: ~2.8 | ns | |||||
EC/C: ~3.8 | EC/C: ~3.5 | ns | |||||
narrow stance, EC/EO/F/C | 30 | 1 | AP RMS amplitude (mm) | EO/F: ~4.2 | EO/F: ~3.6 | ns | |
EC/F: ~4.4 | EC/F: ~4.2 | ns | |||||
EO/C: ~5.9 | EO/C: ~5.1 | p = 0.01 | |||||
EC/C: ~8.2 | EC/C: ~8.3 | ns | |||||
30 | 1 | ML RMS amplitude (mm) | EO/F: ~6.6 | EO/F: ~5.0 | p = 0.02 | ||
EC/F: ~7.3 | EC/F: ~6.0 | ns | |||||
EO/C: ~8.3 | EO/C: ~7.5 | ns | |||||
EC/C: ~10.6 | EC/C: ~10.7 | ns | |||||
Vuillerme et al. [20] ∞ | normal stance, EC/F | 10 | 1 | Variance (mm2) | ~19.5 * | ~13.5 | p < 0.05 |
range (mm) | ~ 20.3* | ~15.5 | p < 0.01 | ||||
mVel (mm/s) | ~17.0 * | ~11.3 | p < 0.001 |