Effectiveness of circular external fixator in periprosthetic fractures around the knee

Table 1

Case no.	Sex/age (years)	Follow-up (months)	Comorbidities	Vancouver classification	Lewis–Rorabeck classification	Felix classification type	Time to union (weeks)
1	F/87	54 (died)	Rheumatoid arthritis, Untreated osteoporosis	C			15
2	M/80	72	Chronic heart failure, Chronic renal failure, Untreated osteoporosis	C			11
3	F/69	89	Hypertension, Untreated osteoporosis	C			12
4	M/69	73	Hypertension, Diabetes mellitus	C			20
5	F/81	50	Hypertension, Diabetes mellitus, osteoporosis				10
6	F/87	88	Hypertension, Diabetes mellitus, Untreated osteoporosis		II		12
7	F/83	85	Hypertension, Untreated osteoporosis		II		12
8	F/80	49	Diabetes mellitus, Untreated osteoporosis		II		11
9	F/88	52	Hypertension, Untreated osteoporosis		II		11
10	F/81	69	Hypertension, Diabetes mellitus, Chronic heart failure, Untreated osteoporosis		II		8
11	F/87	51	Hypertension, Diabetes mellitus, Chronic heart failure, Untreated osteoporosis		II		12
12	F/84	16	Hypertension, Chronic heart failure, Untreated osteoporosis		II		11
13	F/68	89	Hypertension, Diabetes mellitus, Untreated osteoporosis		II		15
14	F/79	75	Untreated osteoporosis		II		10
15	M/64	57	Diabetes mellitus		II		27
16	M/70	68	Diabetes mellitus		II		11
17	F/64	24	Rheumatoid arthritis, Hypertension, Osteoporosis		II		12
18	F/84	70	Severe anemia, Severe obesity, Hypertension, Diabetes mellitus, Osteoporosis		II		38
19	F/84	19 (died)	Rheumatoid arthritis, Hypertension, Diabetes mellitus, Untreated osteoporosis			IIA	10
Mean	79.2	62.8					14.1

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