Table 2.
Prevalence of health conditions and risk factors for all households, and for landline Random Digit Dialling (RDD) and Directory-listed (EWP) telephone samples, 15 years and over
| 2010 | 2011 | 2012 | 2013 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n | % (95 % CI) | RCB | n | % (95 % CI) | RCB | n | % (95 % CI) | RCB | n | % (95 % CI) | RCB | ||
| Health conditions | |||||||||||||
| Diabetes | All households | 229 | 7.5 (6.6–8.5) | 246 | 8.1 (7.1–9.2) | 247 | 8.5 (7.6–9.5) | ||||||
| Landline (RDD) sample | 181 | 7.2 (6.2–8.3) | –0.009 | 195 | 8.3 (7.1–9.6) | 0.003 | 173 | 8.3 (7.4–9.4) | −0.033 | ||||
| Directory-listed sample | 133 | 7.1 (6.0–8.5) | −0.021 | 148 | 8.6 (7.1–10.3) | 0.030 | 117 | 7.9 (6.7–9.4) | −0.077 | ||||
| Current asthma | All households | 416 | 13.6 (12.2–15.3) | 384 | 12.7 (11.4–14.0) | ||||||||
| Landline (RDD) sample | 335 | 13.3 (11.7–15.2) | −0.015 | 297 | 12.6 (11.1–14.2) | −0.002 | |||||||
| Directory-listed sample | 246 | 13.1 (11.3–15.2) | −0.061 | 220 | 12.8 (10.9–15.0) | −0.014 | |||||||
| Arthritis | All households | 653 | 21.4 (19.9–23.1) | 727 | 24.0 (22.3–25.7) | 656 | 21.5 (19.7–23.3) | 640 | 22.0 (20.3–23.8) | ||||
| Landline (RDD) sample | 529 | 21.1 (19.5–22.8) | −0.025 | 554 | 23.5 (21.6–25.4) | −0.031 | 495 | 21.2 (19.3–23.2) | 0.009 | 464 | 22.3 (20.4–24.4) | 0.019 | |
| Directory-listed sample | 387 | 20.7 (18.9–22.6) | −0.083 | 407 | 23.7 (21.4–26.1) | −0.018 | 346 | 20.7 (18.5–23.2) | −0.046 | 324 | 22.0 (19.7–24.4) | −0.016 | |
| Mental health condition | All households | 330 | 10.8 (9.6–12.2) | 359 | 11.8 (10.7–13.1) | 297 | 9.7 (8.7–10.8) | 384 | 13.2 (11.8–14.7) | ||||
| Landline (RDD) sample | 250 | 10.0 (8.6–11.5) | −0.100 | 275 | 11.6 (10.3–13.1) | −0.046 | 222 | 9.5 (8.2–10.9) | −0.025 | 256 | 12.3 (10.7–14.1) | −0.091 | |
| Directory-listed sample | 167 | 8.9 (7.4–10.7) | −0.242 | 221 | 12.9 (11.0–15.0) | 0.056 | 150 | 9.0 (7.6–10.6) | −0.102 | 172 | 11.6 (9.4–14.3) | −0.141 | |
| Health - related risk factors | |||||||||||||
| Current smoker | All households | 614 | 20.2 (18.3–22.1) | 529 | 17.4 (15.8–19.2) | 501 | 16.4 (14.8–18.2) | 552 | 19.0 (16.6–21.6) | ||||
| Landline (RDD) sample | 429 | 17.1 (15.2–19.2) | −0.136 | 343 | 14.5 (12.8–16.5) | −0.191 | 304 | 13.0 (11.4–14.9) | −0.174 | 330 | 15.9 (13.6–18.6) | −0.138 | |
| Directory-listed sample | 316 | 16.9 (14.7–19.3) | −0.129 | 223 | 13.0 (10.9–15.4) | −0.313 | 210 | 12.6 (10.8–14.7) | −0.181 | 202 | 13.7 (11.6–16.1) | −0.244 | |
| Obese | All households | 611 | 22.1 (20.4–24.0) | 612 | 22.7 (20.9–24.6) | 621 | 23.4 (21.5–25.4) | 603 | 23.1 (20.7–25.8) | ||||
| Landline (RDD) sample | 511 | 22.6 (20.7–24.6) | 0.036 | 491 | 23.3 (21.2–25.5) | 0.013 | 474 | 23.5 (21.4–25.8) | −0.020 | 454 | 24.3 (21.8–27.0) | 0.078 | |
| Directory-listed sample | 379 | 22.5 (20.3–25.0) | −0.002 | 359 | 23.8 (21.2–26.6) | 0.059 | 329 | 22.7 (20.1–25.5) | −0.050 | 329 | 24.6 (21.6–27.9) | 0.079 | |
Note: RCB relative coverage bias, Landline (RDD) sample households that had a landline connection (mobile-only households excluded); Directory-listed sample households with either a landline or mobile telephone number listed in the White Pages