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Table 5 Survival rate of children over study period

From: Impact of Spirulina corn soy blend on Iron deficient children aged 6–23 months in Ndhiwa Sub-County Kenya: a randomized controlled trial

Study group Time interval in months Those at risk during interval Nt Average Number at risk of IDA during interval, Nt* Number Recovering from IDA during interval, Rt Lost to Follow-up,
Ct
Proportion Recovering from IDA during interval,
qt
Among those at risk, proportion surviving during
Interval, pt
Survival Probability St
SCSB 0 80 40      
  1 73 73 7   5.39 4.39 4.39
  2 56 36 16 1 12.32 11.32 49.70
  3 32 15.5 23 1 17.71 16.71 81.51
  4 9 4 22 1 16.94 15.94 94.42
  5   4.5 9   6.93 5.93 100.00
  6      0.00 0.00 100.00
CSB 0 80 40      
  1 79 39   1    
  2 78 39 1   0.78 0.22 0.22
  3 77 38.5 1   0.77 0.23 2.05
  4 73 36 3 1 2.19 1.19 3.61
  5 69 34.5 5   3.45 2.45 4.76
  6 59 29.5 10   5.90 4.90 5.49
Placebo 0 80 40      
  1 79 39   1 0.00 0.00 0.00
  2 78 38.5   1 0.00 0.00 0.00
  3 77 38   1 0.00 0.00 0.00
  4 75 37 1 1 0.75 0.75 0.75
  5 74 37   1 0.00 0.00 0.75
  6 72 36 1 1 0.72 0.72 0.54
  1. Table uses the actuarial method to construct the follow-up life table where the time is divided into equal intervals