TABLE 1.
Sample Demographics, by Nutrition Monitoring Survey Year: Western Australia, 1995–2004
| 1995 | 1998 | 2001 | 2004 | |
| Participation rate,a % | 34 | 32 | 33 | 58 |
| Reasons for nonparticipation | ||||
| Hearing loss, language, or age range, % | 7 | 2 | 6 | 20 |
| Refusal, not available for duration, % | 14 | 8 | 20 | 15 |
| Terminations, % | < 1 | < 1 | < 1 | < 1 |
| Gender | ||||
| Men, no. (%) | 274 (37) | 375 (50) | 405 (54) | 300 (50) |
| Women, no. (%) | 474 (63) | 376 (50) | 349 (46) | 301 (50) |
| Total, no. | 748 | 751 | 754 | 601 |
| Education | ||||
| Year 10, junior achievement certificate, no. (%) | 248 (33) | 235 (31) | 210 (28) | 117 (20) |
| Year 12, certificate secondary education, no. (%) | 194 (26) | 187 (25) | 210 (28) | 137 (24) |
| University degree, no. (%) | 238 (32) | 251 (34) | 264 (36) | 245 (42) |
| Apprenticeship or trade qualification, no. (%) | 67 (9) | 78 (10) | 62 (8) | 81 (14) |
| Total, no. | 747 | 751 | 746 | 580 |
| Income, Aus $, no. (%) | ||||
| < 15 000 | 81 (11) | 64 (9) | 61 (9) | 28 (5) |
| 15 000–34 999 | 239 (34) | 185 (26) | 147 (21) | 103 (18) |
| 35 000–50 000 | 188 (26) | 151 (21) | 125 (17) | 98 (17) |
| > 50 000 | 206 (29) | 317 (44) | 376 (53) | 352 (60) |
| Total | 714 (100) | 717 (100) | 709 (100) | 581 (100) |
| Age category, y, no. (%) | ||||
| 18–19 | 30 (4) | 17 (2) | 28 (4) | 16 (3) |
| 20–24 | 55 (7) | 67 (9) | 61 (8) | 51 (8) |
| 25–29 | 74 (10) | 63 (8) | 71 (9) | 59 (10) |
| 30–34 | 111 (15) | 90 (12) | 99 (13) | 64 (11) |
| 35–39 | 111 (15) | 109 (15) | 101 (13) | 61 (10) |
| 40–44 | 105 (14) | 121 (16) | 128 (17) | 78 (13) |
| 45–49 | 98 (13) | 103 (14) | 81 (11) | 64 (11) |
| 50–54 | 62 (8) | 74 (10) | 85 (11) | 72 (12) |
| 55–59 | 49 (7) | 55 (7) | 58 (8) | 91 (15) |
| 60–64 | 53 (7) | 52 (7) | 42 (6) | 45 (7) |
| Total | 748 (100) | 751 (100) | 754 (100) | 601 (100) |
a
Participation rate = completed interviews divided by (completed interviews + refusals + terminations).