Accident 1 Accidents 1 Correlation analysis 1 Correlation methods 1 Descriptive analysis 1 Ergonomic 1 Ergonomic risk factors 1 Ergonomics 1 Factor analysis 1 Harvesting 1 Harvesting activities 1 Health 1 Health risks 1 Human resource management 1 Occupational risks 1 Oil palm plantations 1 Pain Experience Palm oil 1 Petroleum industry 1 Positive correlations 1 Risk assessment 1 Safety and healths 1 Surveys 1 Technology advances 1 Training 1 Workers 1