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Table 1 Subjects selected for the project

From: The effect of calcium and vitamin D supplementation on obesity in postmenopausal women: secondary analysis for a large-scale, placebo controlled, double-blind, 4-year longitudinal clinical trial

Groups Placebo Ca-only Ca + D Total P
Initial subjects 288 445 446 1179  
Exclusion Not finished 44 54 58 155 0.46
  Metal prostheses/implants 36 60 52 148 0.71
  Cancer 20 17 13 50 0.03
Total excluded subjects 82 117 110 309 0.52
Applied subjects 206 328 336 870 0.52
  1. Note: There were some overlaps between different exclusion criteria.
  2. Not finished: subjects who did not finished the 4-year trial; Metal prostheses/implants: subjects with prosthetics or pacemakers implants; Cancer: subjects suffering from cancer during the 4-year trial.
  3. P values were calculated by χ2 test to compare the difference of ineligible subjects among the three groups.