|
|
|
front |1 |2 |3 |4 |5 |6 |7 |8 |9 |10 |11 |12 |13 |14 |15 |16 |17 |18 |19 |20 |21 |22 |23 |24 |25 |26 |27 |28 |29 |30 |31 |32 |33 |34 |35 |36 |37 |38 |39 |40 |41 |42 |43 |44 |45 |46 |47 |48 |review |
 |
Classical method
of Net change measurement: Net change = percentage of change in the intervention community minus percentage of change in the reference community Io = Initial value of the outcome in intervention community I1= Final value of the outcome in intervention community R0 = Initial value of the outcome in the reference community R1 = Final value of the outcome in the reference community FORMULAE a) {(I1 – I0) / I0} - {(R1 – R0) / R0} = ( I1 / I0) - ( R1 / R0) b) {(I1 – R0) / I0 X R1} – 1 (Direct confidence interval estimations). c) {(I1 – I0 – R1) / R0 } + 1 (When reference population is considered as base level) |