19 Table 3.36: The Preventive Efficacy to reduce the stunting incidence after intervention (%) (Stage 1 and T12 of stage 2) Studied place Before interven - tion (%) After interven - tion (%) Difference before / after interven - tion (%) Preven - tive effficacy (%) p Interven - tion group (n=73) 24.7 (n=73) 9.6 15.1 61.1 <0.05 Control group (n=69) 23.2 (n=69) 21.7 1, 5 6.5 >0.05 p >0.05 (0.837) <0.05 χ2 used to compare 2incidences In the intervention group, after the intervention, the stunting incidence was 9.6% lower than that of before the intervention 24.7% with p<0.05.