BackgroundStunting is one of the major child public health concerns in Indonesia. West Nusa Tenggara (WNT) province, specifically, is still struggling to reduce its stunting prevalence as it is still higher than the average national prevalence, accounted for 31.4% in 2018. Ensuring knowledge, attitude, and practices (KAP) of complementary feeding among parents is relevant to succeeding in the implementation of stunting reduction programs. This study aimed to assess the effectiveness of interventions in the form of seminar and workshop on preparing complementary feeding in stunting villages in Central Lombok, Indonesia.MethodsThis is a quasi-experimental community-based study, held in three stunting villages of Central Lombok, WNT, from June until August 2019. Three villages were chosen randomly from ten stunting-villages in Central Lombok District and divided into three groups, i.e., control group, seminar group and seminar and workshop group. We assessed KAP before and after intervention with a four-week interval.ResultsA total of 205 participants were enrolled in this study, consisting of 67, 70, and 68 participants for the control group, the first intervention group, and the second intervention group, respectively. Most participants had poor knowledge (75.1%) of complementary feeding in the baseline assessment. We found an insignificant change in knowledge, but notable alterations in attitudes and practices after intervention. Seminar intervention could increase practice, while complete intervention (seminar and workshop) could increase both practices and attitudes significantly (p = 0.015 dan p = 0.014). We found that complete intervention was more effective in increasing attitudes compared to the control group (p = 0.039). In contrast, practices in both seminar and complete intervention was increased effectively than controls (p = 0.006 vs. p = 0.008), and no differences between seminar and complete intervention group (p = 0.943).ConclusionsComplementary feeding KAP among parents in stunting villages in Central Lombok was inadequate. Our study showed that the combination of seminar and workshop increased parents’ attitudes and practices, while the seminar only increased parents’ practices. We suggest further prospective study to assess how long the effectivity of such interventions could impact and last; and obtain any cultural concerns.Trial registration: 376/UN18.8/ETIK/2018