. 2016 Nov 2;45(6):794–800. doi: 10.1093/ageing/afw126

Table 2.

Multinomial regression results using year 4 data from the non-arthroplasty sample and the first pre-operative year (Model #1) and first post-operative year (Model #2) for the arthroplasty sample

	Model #1 Year 4 non-KA to 1-year pre-op KA^a		Model #2 Year 4 non-KA to 1-year post-op KA^a
	Beta	Odd Ratio (95% CI)	Beta	Odd Ratio (95% CI)
1 Fall^b
Age	0.002	1.00 (0.99, 1.01)	0.02	1.02 (1.01, 1.03)*
Male sex	−0.50	0.60 (0.49, 0.74)*	−0.19	0.83 (0.67, 1.02)
PASE score^a	0	1.0 (0.99, 1.00)	0.001	1.00 (1.00, 1.01)
Depressive symptoms	0.001	1.00 (0.99, 1.02)	0.01	1.01, (0.99, 1.02)
Repeated chair stand	−0.57	0.57 (0.28, 1.17)	−0.36	0.70, (0.34, 1.42)
No comorbidity	−0.20	0.82 (0.66, 1.01)	−0.02	0.98 (0.78, 1.23)
No narcotic use	−0.46	0.63 (0.41, 0.97)*	−0.26	0.77 (0.50, 1.19)
No prior falls	−0.88	0.41 (0.34, 0.50)*	−0.90	0.41 (0.33, 0.50)*
No knee replacement	−0.31	0.74 (0.47, 1.15)^c	−0.25	0.78 (0.55, 1.20)^c
2 or more falls^b
Age	−0.02	0.98 (0.97, 0.99)*	−0.01	0.99 (0.98, 1.01)
Male sex	−0.07	0.93 (0.74, 1.16)	0.21	1.24 (0.99, 1.55)
PASE score^a	0.001	1.00 (1.00, 1.00)	0.002	1.00 (1.00, 1.00)
Depressive symptoms	0.05	1.05 (1.04, 1.07)*	0.04	1.04 (1.03, 1.05)*
Repeated chair stand	−0.28	0.76 (0.34, 1.70)	−0.49	0.62 (0.29, 1.32)
No comorbidity	−0.27	0.77 (0.60, 0.97)*	−0.17	0.80 (0.66, 1.08)
No narcotic use	−0.64	0.53 (0.34, 0.82)*	−0.11	0.89 (0.55, 1.44)
No prior falls	−1.81	0.16 (0.13, 0.21)*	−2.00	0.14 (0.10, 0.18)*
No knee replacement	0.33	1.39 (0.91, 2.14)^c	0.41	0.67 (0.36, 1.23)^c

^aKA, knee arthroplasty; PASE, Physical Activity Scale for the Elderly.

^bIn the multinomial regression, the reference group is no falls and the 2 comparison groups or persons with 1 fall and persons with 2 or more falls.

^cWhether a person had a knee replacement was not significantly associated with falls in either model.

*P < 0.05.