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. Author manuscript; available in PMC: 2013 Dec 1.
Published in final edited form as: Arthritis Care Res (Hoboken). 2012 Dec;64(12):1895–1902. doi: 10.1002/acr.21783

Table 4.

Sex-Specific Association between Clinical Balance and COP-Based Static Balance Measures: The MOBILIZE Boston Study

Clinic Balance Measures COP-Based Static Balance
Average Sway Speed (mm/s) Area Ellipse Sway (mm2)
Men Women Men Women
Beta (SE) R2 Beta (SE) R2 Beta (SE) R2 Beta (SE) R2
SPPB Balance Crude1 −2.4 (0.37) 0.132 −1.1 (0.20) 0.057 −50.0 (11.8) 0.060 −25.5 (5.3) 0.046
 Adj. Height −2.6 (0.39) 0.139 −0.9 (0.20) 0.079 −54.0 (12.3) 0.073 −27.9 (5.4) 0.058
 Adj. Height + Weight −2.6 (0.39) 0.142 −1.1 (0.19) 0.209 −50.9 (12.2) 0.095 −25.8 (5.4) 0.074
 Adj.2 Height + Weight + Age −2.1 (0.41) 0.176 −1.0 (0.19) 0.218 −34.3 (13.0) 0.130 −24.4 (5.6) 0.074
Berg Balance Scale Crude1 −0.44 (0.056) 0.185 −0.19 (0.037) 0.052 −12.0 (1.8) 0.148 −5.8 (0.95) 0.074
 Adj. Height −0.48 (0.059) 0.199 −0.15 (0.037) 0.068 −13.3 (1.8) 0.171 −6.6 (0.98) 0.094
 Adj. Height + Weight −0.50 (0.059) 0.210 −0.25 (0.035) 0.227 −12.7 (1.8) 0.183 −6.2 (1.0) 0.102
 Adj.3 Height + Weight + Age −0.43 (0.063) 0.231 −0.22 (0.039) 0.230 −10.8 (2.0) 0.198 −6.2 (1.1) 0.100
1-Leg Stand (Seconds) Crude1 −0.27 (0.042) 0.133 −0.12 (0.029) 0.031 −7.3 (1.3) 0.107 −4.4 (0.75) 0.067
 Adj. Height −0.28 (0.042) 0.137 −0.09 (0.029) 0.055 −7.4 (1.3) 0.113 −4.9 (0.77) 0.084
 Adj. Height + Weight −0.29 (0.042) 0.143 −0.14 (0.028) 0.192 −7.0 (1.31) 0.130 −4.5 (0.77) 0.095
 Adj.4 Height + Weight + Age −0.23 (0.046) 0.171 −0.12 (0.030) 0.200 −5.3 (1.4) 0.151 −4.5 (0.83) 0.093
1

Crude R2 is unadjusted, all others are adjusted R2; all crude and adjusted p-values < 0.01 for the association between clinical-based “predicting” COP-based static balance

2

P-interaction <0.001 between gender and SPPB predicting sway speed adjusting for ht, wt, and age; and is 0.054 predicting area of ellipse sway

3

P-interaction <0.001 between gender and Berg predicting sway speed adjusting for ht, wt, and age; and is 0.005 predicting area of ellipse sway

4

P-interaction 0.02 between gender and 1-leg stand predicting sway speed adjusting for ht, wt, and age; and is 0.057 predicting area of ellipse sway