Observed practice
The intervention appears to have improved the handwashing practices of the workers before wearing PPEs (DID: 27%, CI: 2, 52), after finishing work (DID: 31%, CI: −7, 69) and during work intervals (DID: 30%, CI: −33, 93). However, it did not improve the adherence to proper handwashing protocols (DID: 22%, CI: −42, 86) and handwashing practices before having snacks/meals (DID: 2%, CI: −61, 65), and after using the toilet (DID: 7%, CI: −41, 55). Workers' improved practices of maintaining COVID-19 prevention measures such as coughing etiquette (DID: 20%, CI: 0.2, 40), not sharing while smoking or drinking (DID: 11%, CI: −27, 49), maintaining social distance at the workplace (DID: 13%, CI: −19, 46), handwashing before touching face (DID: 31%, CI: 8, 54) were more likely to have positive associations with the intervention. while, although improved in endline intervention areas, the practice of mask use (DID: 1%, CI: −40, 42) was less likely to be associated. The intervention might have improved the practices of cleaning equipment after work (DID: 9%, CI: −8, 26) but did not improve the practice of disinfecting the equipment (DID: −14%, CI: −34, 6) by the workers. Also, the observed practices of the workers in keeping waste in designated places seemed to be motivated by the intervention (DID: 9%, CI: −8, 26) (Observed practice of the workers in maintaining OHS and COVID-19 prevention measures.