Results
There were 62 registered sawmills of which
38 were operating during the period of the study. No randomisation was done; all of the workers were included in the study except those who declined. Out of 602 sawmill workers, 553 agreed to participate: 449 (93.3%) out of 481 technical workers and 104 (86.0%) out of 121 administrative sawmill workers. The response rate was 91.9%. Those who were unwilling to participate felt the study would interrupt and delay the completion of their tasks for the day. There were 496 (89.7%) males and 57 (10.3%) females, with a male to female ratio of 8.7:1. The technical workers had a male to female ratio of 12.6:1, whereas for administrative workers, 3.3:1. All of the workers were Nigerians.