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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