Table 2.

Univariate and multivariate analyses of association of demographic factors with at least annual radiographic followup in 742 patients

	No. Annual Screening (%)		OR (95% CI)
	Yes	No	Unadjusted*	Multivariate†
Age:
17–39	139 (43.3)	182 (56.7)	Referent	Referent
40–49	97 (50.8)	94 (49.2)	1.35 (0.94–1.93)	1.30 (0.91–1.88)
50–63	122 (53)	108 (47)	1.47 (1.05–2.08)‡	1.41 (1.00–2.00)‡
Male	131 (42.3)	179 (57.7)	Referent	Referent
Female	227 (52.5)	205 (47.5)	1.51 (1.13–2.03)‡	1.48 (1.10–2.00)‡
Length of stay (days):
2 or Less	208 (47.6)	229 (52.4)	Referent	Referent
3–5	123 (46.8)	140 (53.2)	0.97 (0.71–1.31)	0.92 (0.67–1.26)
6 or Greater	27 (64.3)	15 (35.7)	1.98 (1.03–3.83)‡	1.92 (0.99–3.73)

^*CCI, operative approach, surgery year, geographic region, HMO insurance status and need for secondary procedure showed no statistically significant association with annual screening status.

^†Adjusted for CCI, operative approach, surgery year, geographic region, HMO insurance status and need for secondary procedure.

^‡Significant (p <0.05).