How are those “lost to follow-up” patients really doing? A compliance comparison in arthroplasty patients

Table 1 Active follow-up in the office and non-compliant with office follow-up visits baseline demographics n (%)

Group	OFU	NFU	P value
Number of patients	444	144
Surgeon 1	179 (40.3)	51 (35.4)	0.295
Surgeon 2	265 (59.7)	179 (64.6)
Age at procedure	62.4 ± 12.9	59.6 ± 13.3	0.026a
Length of stay (d)	3.1 ± 1.3	3.4 ± 2.1	0.217
Gender: female	250 (56.3)	67 (46.5)	0.041a
Comorbidities	324 (73.0)	112 (77.8)	0.252
Operative side: right	53.4%	50%	0.542
SF12 physical	30.4 ± 8.2	30.2 ± 7.2	0.778
SF12 mental	49.8 ± 11.4	47.9 ± 11.5	0.080
WOMAC pain score	44.9 ± 26.6	46.6 ± 27.8	0.506
WOMAC stiffness score	42.0 ± 25.1	43.3 ± 23.0	0.581
WOMAC function score	46.0 ± 21.6	48.2 ± 20.9	0.271
BMI (kg/m2)	30.3 ± 7.0	29.9 ± 6.9	0.634
Diagnosis			0.734
Osteoarthritis	347 (78.2)	106 (73.6)
Osteonecrosis	45 (10.1)	18 (12.5)
Rheumatoid arthritis	44 (9.9)	17 (11.8)
Other	8 (2.1)	3 (1.8)
Operative procedure			0.541

^aP < 0.05 vs OFU. WOMAC: Western Ontario and McMaster Universities Osteoarthritis Index; BMI: Body mass index; OFU: Active follow-up in the office; NFU: Non-compliant with office follow-up visits.