Table 1 Response rate to the invitation to take part in the Link-Up Study, according to demographic, lifestyle and other factors
Characteristic | Total | Participated | Rate Ratio (crude) of participation |
|---|---|---|---|
N | N (%) | (95% CI) | |
Distance of residence from collection centre | |||
<5km | 1170 | 387 (33%) | 1.00 |
≥5km | 1170 | 375 (32%) | 0.97 (0.87 - 1.09) |
Time since joining The 45 and Up Study | |||
Less than 1 year | 1128 | 381 (34%) | 1.00 |
1 - <2 years | 855 | 278 (33%) | 0.98 (0.86 - 1.11) |
2 years or more | 357 | 103 (29%) | 0.87 (0.73 - 1.04) |
Age | |||
45-64 yrs | 1464 | 499 (34%) | 1.00 |
65-79 yrs | 611 | 223 (36%) | 1.07 (0.95 - 1.21) |
≥80 yrs | 265 | 40 (15%) | 0.45 (0.34 - 0.60) |
Sex | |||
Male | 1107 | 348 (31%) | 1.00 |
Female | 1233 | 414 (34%) | 0.94 (0.84 - 1.06) |
Educational qualifications | |||
Wagga Wagga | |||
Not Tertiary Educated | 765 | 287 (38%) | 1.00 |
Tertiary Educated | 221 | 118 (53%) | 1.37 (1.18 - 1.60) |
Parramatta | |||
Not Tertiary Educated | 971 | 244 (25%) | 1.00 |
Tertiary Educated | 336 | 102 (31%) | 1.20 (0.99 - 1.46) |
Country of origin | |||
Born in Australia | 1696 | 608 (36%) | 1.00 |
Not born in Australia | 644 | 154 (23%) | 0.69 (0.59 - 0.81) |
Annual household pre-tax income | |||
<$20,000 | 444 | 106 (24%) | 1.00 |
$20,000-$49,999 | 535 | 174 (33%) | 1.37 (1.12 - 1.68) |
≥$50,000 | 1249 | 455 (36%) | 1.50 (1.26 - 1.80) |
Employment status | |||
Not in paid work | 1021 | 309 (30%) | 1.00 |
Part time paid work | 433 | 160 (37%) | 1.24 (1.07 - 1.44) |
Full time paid work | 837 | 282 (34%) | 1.10 (0.97 - 1.25) |
Carer status | |||
Not a full-time carer | 2242 | 743 (33%) | 1.00 |
Full-time carer | 94 | 19 (20%) | 0.62 (0.42 - 0.93) |
Disability | |||
No major disability | 2092 | 714 (31%) | 1.00 |
Major disability | 137 | 26 (18%) | 0.54 (0.38 - 0.76) |
Physical functional limitations | |||
None | 719 | 242 (34%) | 1.00 |
Mild | 591 | 245 (41%) | 1.22 (1.06 - 1.39) |
Moderate | 450 | 152 (34%) | 1.00 (0.85 - 1.18) |
Severe | 352 | 72 (20%) | 0.61 (0.49 - 0.77) |
Smoking status | |||
Never smoker | 1425 | 497 (35%) | 1.00 |
Current smoker | 159 | 37 (23%) | 0.66 (0.50 - 0.89) |
Ex-smoker | 736 | 225 (31%) | 0.88 (0.78 - 1.00) |
Body mass index | |||
Underweight | 38 | 9 (24%) | 0.95 (0.80 - 1.12) |
Normal weight | 702 | 227 (32%) | 1.00 |
Overweight | 838 | 292 (35%) | 1.08 (0.94 - 1.24) |
Obese | 516 | 158 (31%) | 0.73 (0.41 - 1.31) |