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Table 3 Background characteristics associated with successful matching in the dataset of records matched by means of fingerprints

From: The promise of record linkage for assessing the uptake of health services in resource constrained settings: a pilot study from South Africa

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 χ 2 (p-value)

0.11, 56.89 (<0.0001)

0.16, 51.94 (<0.0001)

0.16, 53.76 (<0.0001)

  1. Statistical significance: * = p-value < 0.05.