Methodology Report 2024/25: New Zealand Health Survey

This methodology report details the procedures and protocols followed to ensure the New Zealand Health Survey produces the high-quality and robust data expected of official statistics.

The New Zealand Health Survey is a face-to-face survey with a multi-stage sampling design that involves randomly selecting a sample of small geographic areas, households within the selected areas, and individuals within the selected households. One adult aged 15 years or older and one child aged 14 years or younger (if any in the household) were chosen at random from each selected household.

Survey respondents are selected from the ‘usually resident’ population.

Of those invited to participate in the survey in 2024/25, the weighted response rate was 75% for adults and 72% for children. 9,253 adults and 2,805 primary caregivers (representing their children) agreed to be interviewed. This included 1,084 disabled adults and 260 disabled children.

Included in the methodology report is information about:

• the survey population and sample design
• data collection
• response and coverage rates
• data processing
• weighting
• analysis methods
• changes in previously published statistics.