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Table 2 Post-randomisation distribution of risk variables and adherence according to treatment group for women with a history of premature delivery (HPD)

From: A randomised controlled trial of probiotics for the prevention of spontaneous preterm delivery associated with bacterial vaginosis: preliminary results

  Placebo Treatment   Total
Factor Frequency % Mean Frequency % Mean   Frequency % Mean
Gestacional Age at           
Randomization           
< 12w 2 12.5% 11w.6d 2 10.5% 11w.1d   4 11.4% 11w.4d
(12w-16w) 7 43.8% 14w.3d 7 36.8% 14w.3d   14 40.0% 14w.3d
(16w-20w) 7 43.8% 17w.5d 10 52.6% 19w.4d   17 48.6% 18w.6d
Total 16 100.0% 15w.4d 19 100.0% 16w.5d   35 100.0% 16w.2d
Nugent Score           
4-6 5 31.3% 4.8 5 26.3% 5.4   10 28.6% 5.1
7-8 9 56.3% 7.8 9 47.4% 7.7   18 51.4% 7.7
9-10 2 12.5% 9.0 5 26.3% 9.0   7 20.0% 9.0
Total 16 100.0% 7 19 100.0% 7.4   35 100.0% 7.2
Height(m)           
< = 1.55 4 25.0% 1.51 5 26.3% 1.53 9 25.7% 1.52  
>1.55 12 75.0% 1.64 14 73.7% 1.63 26 74.3% 1.63  
Total 16 100.0% 1.61 19 100.0% 1.60 35 100.0% 1.60  
Ethnicity           
White 3 18.8%   5 26.3%   8 22.9%   
Black 13 81.2%   14 73.7%   27 77.1%   
Total 16 100.0%   19 100.0%   35 100.0%   
Adherence           
No 4 25.0%   7 36.8%   11 31.4%   
Yes 12 75.0%   12 63.2%   24 68.6%   
Total 16 100.05   19 100.0%   35 100.0%