Table 3. Percentages of demographic variables for each response class.

	Explicit Withdrawals	Lost Respondents	Intermittent Respondents	Constant Respondents
NZ European	79.2	70.8	78	88.7
Māori	13	25.6	22.6	13.1
Pacific	3.4	7.7	5.2	2.8
Asian	7.6	8.0	6.1	2.9
Other	5	3.8	2.8	3.5
Gender (female)	58.1	56.0	57.9	62.7
Age (mean)	53.1	40.2	44.2	51.1

Note: N(Explicit withdrawals) = 499.

N(Lost Participants) = 1065, N(Intermittent Respondents) = 1733.

N(Constant Respondents) = 3088.

Respondents could report more than one ethnicity.