Table 2.

Correlation of Age, Body Mass Index, Lesion Size, and Symptom Duration with the German Version of the Foot Function Index (FFI-D) Scores (N = 18 Patients).

Variable	FFI Score Preoperatively			FFI Score at 1-Year FU			FFI Score at 5-Year FU			FFI Score at 10-Year FU
	Pain	Function	Total	Pain	Function	Total	Pain	Function	Total	Pain	Function	Total
Age
Correlation coefficient	0.63	0.54	0.59	0.40	0.30	0.37	0.42	0.53	0.50	0.34	0.61	0.54
P value	<0.01	0.02	0.01	0.11	0.24	0.15	0.08	0.02	0.04	0.17	<0.01	0.02
BMI
Correlation coefficient	0.53	0.41	0.50	0.09	0.02	0.06	0.19	0.17	0.16	0.11	0.25	0.17
P value	0.02	0.09	0.04	0.73	0.94	0.83	0.45	0.49	0.52	0.68	0.31	0.49
Lesion size
Correlation coefficient	0.56	0.48	0.56	0.28	0.27	0.28	0.36	0.44	0.37	0.45	0.45	0.47
P value	0.03	0.06	0.03	0.32	0.34	0.32	0.17	0.09	0.16	0.08	0.08	0.07

BMI = body mass index; FFI-D = German version of Foot Function Index; FU = follow-up.

Bold indicates P values < 0.05.