Table 3. Correlation coefficients between all combinations.

HKA: hip-knee-ankle, PFI: pronated foot index, FTA: femoro-tibial angle, TCA: tibiocalcaneal angle, HVA: hallux valgus angle, M1-M2A: intermetatarsal angle between the first and second metatarsal bones, M1-M5A: intermetatarsal angle between the first and fifth metatarsal bones, M2-M5A: intermetatarsal angle between the second and fifth metatarsal bones, DAS: Disease Activity Score

	Disease duration	Age	Loading point index	HKA angle	TCA	PFI	Talo-1st metatarsal angle	Calcaneal pitch angle	HVA	M1-M2A	M1-M5A	M2-M5A	Hardy grade	DAS28-CRP
Disease duration	1
Age	0.040	1
Loading point index	0.065	-0.258	1
HKA angle	-0.073	-0.249	-0.069	1
TCA	-0.040	-0.254	0.446	0.286	1
PFI	-0.028	0.204	-0.465	-0.080	-0.368	1
Talo-1st metatarsal angle	-0.034	-0.073	0.479	-0.200	0.404	-0.290	1
Calcaneal pitch angle	-0.156	-0.058	-0.228	0.098	-0.202	0.114	-0.594	1
HVA	0.101	0.082	0.260	0.063	0.330	-0.278	0.105	-0.071	1
M1-M2A	-0.008	0.108	0.428	0.060	0.369	-0.411	0.250	-0.092	0.666	1
M1-M5A	0.045	0.205	-0.053	0.168	0.100	-0.170	-0.191	0.147	0.560	0.552	1
M2-M5A	0.059	0.146	-0.434	0.144	-0.204	0.156	-0.439	0.247	0.072	-0.224	0.689	1
Hardy grade	0.092	0.108	0.447	-0.059	0.380	-0.458	0.226	-0.105	0.745	0.716	0.331	-0.232	1
DAS28-CRP	0.058	0.075	-0.189	0.008	-0.251	0.146	-0.158	0.043	-0.015	-0.136	0.204	0.353	-0.209	1