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Table 1 Subject characteristics and pre- and post-study (8 weeks) body mass and BMI (N = 100) (mean ± SE)

From: A commercialized dietary supplement alleviates joint pain in community adults: a double-blind, placebo-controlled community trial

Variable Instaflex (N = 49; 41 F, 8 M) Placebo (N = 51; 42 F, 9 M) Range P-Value ( t-test or ANOVA)
Age (yrs) 57.6 ± 0.9 58.3 ± 0.8 50-75 0.554
Height (m) 1.67 ± 0.01 1.65 ± 0.01 1.46-1.84 0.106
Body mass (kg)     
  Pre-Study 89.3 ± 2.6 84.8 ± 2.3 54.5-140.9 0.422
  Post-Study 89.4 ± 2.6 84.7 ± 2.3   
BMI     
  Pre-Study 31.6 ± 0.9 30.9 ± 0.8 21.1-48.0 0.536
  Post-Study 31.6 ± 0.9 30.8 ± 0.8