Table 3

Background characteristics associated with successful matching in the dataset of records matched by means of fingerprints
Variable n Linkage scenario 6 Linkage scenario 16 Linkage scenario 17
Matched Multivariable Matched Multivariable Matched Multivariable
n (%) OR (95% CI) n (%) OR (95% CI) n (%) OR (95% CI)
623 492 (79.0) 551 (88.4) 552 (88.6)
Sex
Female 511 395 (77.3) 1 445 (87.1) 1 447 (87.5) 1
Male 112 97 (86.6) 2.86 (1.41-5.82)* 106 (94.6) 4.38 (1.52-12.61)* 105 (93.8) 3.34 (1.25-8.97)*
Age
18-34 334 284 (85.0) 1 308 (92.2) 1 308 (92.2) 1
35-49 125 100 (80.0) 0.99 (0.53-1.84) 112 (89.6) 0.84 (0.36-1.93) 115 (92.0) 1.21 (0.5-2.92)
50-64 89 66 (74.2) 0.76 (0.35-1.66) 78 (87.6) 0.75 (0.27-2.14) 77 (86.5) 0.75 (0.27-2.12)
65+ 75 42 (56.0) 0.35 (0.15-0.85)* 53 (70.7) 0.21 (0.07-0.63)* 52 (69.3) 0.25 (0.08-0.74)*
Ethnicity
Other 96 67 (70.0) 1 76 (79.2) 1 75 (78.1) 1
South African 527 425 (80.7) 1.3 (0.71-2.37) 475 (90.1) 1.82 (0.88-3.77) 477 (90.5) 2.1 (1.02-4.33)*
Residence status
Permanent 574 450 (78.4) 1 506 (88.1) 1 507 (88.3) 1
Temporary and other 49 42 (85.7) 1.63 (0.54-4.88) 45 (91.8) 1.28 (0.28-5.89) 45 (91.8) 1.4 (0.31-6.44)
Highest level of education
None 97 54 (55.7) 1 71 (73.2) 1 69 (71.1) 1
Some primary 191 144 (75.4) 1.46 (0.76-2.83) 164 (85.8) 1.16 (0.51-2.63) 166 (87.0) 1.43 (0.64-3.22)
Post primary 302 267 (88.4) 2.73 (1.18-6.36)* 288 (95.4) 2.62 (0.87-7.92) 288 (95.4) 3.05 (1.01-9.24)*
Employment
Not working 514 413 (80.4) 1 462 (89.8) 1 460 (89.5) 1
Working 93 70 (75.3) 0.68 (0.37-1.25) 79 (85.0) 0.53 (0.25-1.14) 81 (87.1) 0.71 (0.32-1.58)
Wealth quintile
Lowest 44 28 (63.6) 1 33 (75.0) 1 34 (77.3) 1
Second 84 62 (73.8) 1.48 (0.63-3.49) 75 (89.3) 2.42 (0.84-6.98) 73 (90.0) 1.63 (0.57-4.62)
Middle 125 100 (80.0) 1.89 (0.82-4.37) 108 (86.4) 1.60 (0.6-4.25) 110 (88.0) 1.58 (0.58-4.36)
Fourth 172 136 (79.1) 1.81 (0.8-4.11) 152 (88.3) 2.08 (0.78-5.54) 150 (87.2) 1.47 (0.55-3.93)
Highest 184 159 (86.4) 2.9 (1.24-6.75)* 174 (94.5) 4.4 (1.51-12.84)* 175 (95.1) 4.03 (1.34-12.17)*
Goodness-of-fit
Pseudo R2, Wald χ2 (p-value) 0.11, 56.89 (<0.0001) 0.16, 51.94 (<0.0001) 0.16, 53.76 (<0.0001)

Statistical significance: * = p-value < 0.05.

Kabudula et al.

Kabudula et al. BMC Medical Research Methodology 2014 14:71   doi:10.1186/1471-2288-14-71

Open Data