Table 3.

Factors associated with response to a follow-up questionairre: multivariable analysis

Patient characteristics	OR (95% CI)	p value
Age (years)	1.01 (0.996 to 1.03)	0.134
Female sex	1.43 (1.03 to 1.97)	0.031
Racea
Asian	0.92 (0.30 to 2.79)	0.881
Black	1.38 (0.73 to 2.59)	0.332
Hispanic	0.83 (0.43 to 1.59)	0.569
Other	0.42 (0.13 to 1.38)	0.152
Marital statusb
Single	Reference
Married	1.24 (0.86 to 1.81)	0.255
Divorced	0.61 (0.33 to 1.15)	0.124
Widowed	1.14 (0.37 to 3.47)	0.819
Occupationc
Unemployed	1.10 (0.72 to 1.69)	0.659
Student	0.49 (0.12 to 2.05)	0.330
Retired	0.96 (0.56 to 1.66)	0.893
Unable to work	2.54 (0.99 to 6.55)	0.054
Median income based on ZIP coded	1.000005 (0.9999998 to 1.000011)	0.058
Time from surgery to follow-up (years)	0.95 (0.92 to 0.99)	0.015
Study characteristics
More than one researcher calling	0.51 (0.37 to 0.71)	< 0.001

Number of values in variables with missing data:

^an = 765;

^bn = 766;

^cn = 726;

^dn = 786.