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Table 5 Changes in 6 MWD Between and Within Groups Over 12 weeks of treatment.

From: A natural mineral supplement provides relief from knee osteoarthritis symptoms: a randomized controlled pilot trial

Variable Baseline 6 MWD End 6 MWD Baseline-End 6 MWD
PBO 1323.4 1331.9 -8.4
SD 226.1 250.2 109.3
Sig.*    NS
A 1427.5 1528.8 -101.3
SD 225.6 252.3 121.5
Sig.*    0.001
GS 1410.1 1456.8 -55.7
SD 246.1 256.1 103
Sig.*    0.03
G+A 1363.1 1378.1 -15
SD 253.7 253 126.6
Sig.*    NS
p (ANCOVA)    NS
  1. *Sig. = significance by within group paired t-test; 2-tailed; ANCOVA comparison between groups with baseline measure as covariate