What drives the surveillance interval
Interval depends on the hazard profile in your HIRARC / chemical register, noise exposure, previous abnormal results, and what your Occupational Health Doctor documents as the next review date. A general GP checkup is not the same as statutory OHD surveillance.
Compare: OHD vs GP Checkup for Employers in Johor · OHD service: occupational health (OHD) in Johor.
When-need FAQ: When Do I Need an OHD Doctor in Johor?.