Table 1

Demographic information: study population versus non-participants

Study population (n=1064) Non-participants1-150(n=2446) p Value
Mean age (years)1-151 50.250.4NS
 n1064676
Sex1-152 <0.001
 Male423 (39.8%)1113 (46.4%)
 Female641 (60.2%)1286 (53.6%)
 Total10642399
Ethnicity1-151 NS
 European1021 (96.0%)641 (94.1%)
 Maori23 (2.2%)15 (2.2%)
 Pacific Islander8 (0.8%)7 (1.0%)
 Other12 (1.1%)18 (2.6%)
 Total1064681
Employment status1-152 <0.001
 Unemployed26 (2.5%)97 (4.3%)
 Homemaker173 (16.7%)324 (14.3%)
 Retired230 (22.2%)361 (15.9%)
 Employed559 (53.9%)1289 (59.6%)
 Student50 (4.8%)196 (8.6%)
 Total10382267
  • 1-150 Non-participants are those subjects, randomly selected from the electoral rolls, who were approached but not recruited.

  • 1-151 Information obtained from interview (age, ethnicity).

  • 1-152 Information extracted from the electoral roll (sex, employment status) when available.