Analytic method

Intervention arm

Control arm



Numerator

Denominator

Numerator

Denominator


Complete (available) case analysis

c

a  b

g

e  f

None has event

c

a

g

e

All had event

b + c

a

f + g

e

Best case scenario

c

a

f + g

e

Worst case scenario

b + c

a

g

e

Using the concept of RI_{LTFU/FU}

[b x y x c/(a  b)] + c

a

[f x z x g/(e  f)] + g

e

Incidence for missing participants same as observed in same arm^{a}

[b x c/(a  b)] + c

a

[f x g/(e  f)] + g

e

Incidence for missing participants in both arms same as observed in control arm

[b x g/(e  f)] + c

a

[f x g/(e  f) ] + g

e

 Refer to Table 1 for what values letters ag refer to y and z refer to RI_{LTFU/FU} in the intervention and control arm, respectively[8].

^{a}This is a special case of RI_{LTFU/FU} method where y = z = 1.