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Table 1 Baseline subject characteristics of the whole population (N = 100), by product group

From: Probiotic strain Bacillus subtilis CU1 stimulates immune system of elderly during common infectious disease period: a randomized, double-blind placebo-controlled study

  Probiotic group Placebo group
(N = 50) (N = 50)
  Mean SD Mean SD
Age (years) 63.3 2.8 63.0 2.4
Body weight (kg) 60.5 22.5 57.4 21.2
Body mass index (kg/m2) 25.5 5.0 24.9 4.0
Females     
   n 40   39  
  % 80.0   78.0  
CID during previous winter 2.7 1.0 3.2 1.2
Vaccination     
 Seasonal influenza     
   n 8 7
  % 16.0 14.0
Influenza A     
   n 4 6
  % 8.0 12.0
Pneumococcus     
   n 0 0
  % 0.0 0.0
  1. Mean values and standard deviations; numbers and percentages