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)

Note: Numbers do not always add up to total due to missing values.

Banks et al.

Banks et al. BMC Research Notes 2012 5:655   doi:10.1186/1756-0500-5-655

Open Data