Table 4. Ordinal regression results EQ-5D-5L mobility domain scores.

	EQ-5D-5L Mobility domain
	Model 1		Model 2		Model 3		Model 4
	β	SE	β	SE	β	SE	β	SE
(Threshold)
Mobility=1	−0.032	1.413	0.984	1.844	18.452**	2.503	21.414**	2.853
Mobility=2	2.548	1.427	3.571	1.860	21.104**	2.525	24.143**	2.883
Mobility=3	4.403**	1.564	5.427	1.968**	22.969**	2.607	26.022**	2.958
Age	−0.067	0.102	−0.007	0.116	0.021	0.134	0.024	0.139
Sex (female)	−1.197**	0.467	−1.181*	0.467*	−1.460**	0.519	−1.438**	0.530
Cause (ref: trauma)
Dysvascular	−0.415	0.753	−0.369	0.761	−0.612	0.804	−0.398	0.839
Congenital	1.418	1.180	1.167	1.215	0.906	1.271	1.101	1.389
Phantom_pain			0.292	0.330	0.433	0.342	0.458	0.347
Prosthetic use			0.005	0.008	0.009	0.008	0.012	0.009
Prosthesis (above-knee)			−0.186	0.324	−0.102	0.338	−0.029	0.345
Income					−0.061	0.110	−0.072	0.112
Education					0.124	0.154	0.176	0.158
Residence (rural)					−0.250	0.320	−0.396	0.334
Marital status (ref: married)
Single					−0.463	0.576	−0.315	0.583
Divorced					1.362	0.940	1.704	1.032
Widowed					0.765	0.846	1.047	0.872
Employment (ref: employee)
Housewife					−0.011	0.836	−0.005	0.858
Business owner					0.071	0.397	0.205	0.410
Unemployed					−0.519	0.614	−0.188	0.631
Student					16.185	0.000	15.810	0.000
PTSD_score							−0.134	0.114
K10							0.103*	0.034
−2 Log likelihood intercept	374.595		374.595		374.595		374.595
−2 Log likelihood final	365.473		364.052		355.968		346.901
X2	9.121		10.542		18.627		27.694

*p<0.05; **p<0.001.

Mobility = 1 reflects the boundary between ‘no problems walking around’ and ‘little trouble walking around’. Mobility = 2 reflects the boundary between ‘little trouble’ and ‘moderate trouble walking around’. Mobility = 3 reflects the boundary between ‘moderate’ and ‘severe problems walking around’.

EQ-5D-5L, EuroQol five-dimensional five levels; PTSD, post-traumatic stress disorder.