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Table 4 Proportion and predictors of locating women who required tracing, n = 372

From: Predictors of locating women six to eight years after contact: internet resources at recruitment may help to improve response rates in longitudinal research

 

Located

Crude odds ratio

Adjusted* odds ratio

 

(n = 181)

OR

(95% CI)

OR

(95% CI)

 

n

(%)

    

Age group (years)

      

   65–69

37

(55.2)

1.95

(1.09–3.50)

1.73

(0.93–3.22)

   70–79

87

(55.1)

1.94

(1.23–3.05)

2.13

(1.31–3.46)

   80–89

57

(38.8)

1.00

(referent)

1.00

(referent)

Region (population density)

      

   Low

91

(54.8)

1.00

(referent)

1.00

(referent)

   High

90

(43.7)

0.64

(0.42–0.97)

0.55

(0.35–0.86)

2001 web-search

      

   Yes

70

(56.5)

1.60

(1.04–2.47)

1.82

(1.14–2.90)

   No

111

(44.8)

1.00

(referent)

1.00

(referent)

Study address status§

      

   No change

41

(60.3)

1.00

(referent)

1.00

(referent)

   New address

10

(58.8)

0.64

(0.25–1.69)

1.00

(0.33–3.02)

   Possible address

66

(61.1)

0.93

(0.49–1.77)

1.09

(0.57–2.07)

   Unable to determine

64

(35.8)

0.33

(0.18–0.60)

0.34

(0.19–0.61)

Reason required tracing

      

   Returned mail

128

(50.0)

1.00

(referent)

  

   Incorrect number

53

(45.7)

1.19

(0.77–1.85)

  
  1. CI = confidence interval.
  2. OR = odds ratio.
  3. *Adjusted for all variables indicated in the table (all variable except reason in tracing which was not significant).
  4. Low population density = Oxford County, population density = 49/km2; high population density = East York within Toronto, population density = 5,418/km2 [9].
  5. Included in pilot study having web-search completed in June 2001; results only used if tracing was required after the study web-search prior to recruitment (March–May 2003).
  6. §Address status as determined by March–May 2003 web-search [10-12]; completed blind of 2001 web-search results.