The ministry's health and safety operations general manager, Ona de Rooy, said she was "pleased to see this positive shift in behaviour".
Federated Farmers health and safety spokeswoman Jeanette Maxwell said while quadbikes were used mostly on farms, "not all accidents are farm-related".
"That distinction is an important one because farm-related quadbike injury and death remains thankfully rare, especially when compared to the road and drowning tolls," she said.
The ministry's survey of quadbike accident victims found half had made changes to act more safely since their accident, including carrying few passengers and increasing use of helmets.
"Despite these positive indicators, serious harm on farms continues to be a significant problem for New Zealand and we are determined to reduce the toll further," Ms de Rooy said.
"The ministry is increasing its efforts over the summer months and inspectors will be visiting farms around the country to enforce safety issues and to provide guidance to farm employees."
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