The association between motor capacity and mobility performance: frailty as a moderator

Table 2 Multiple stepwise regression of NWS on mobility performance outcomes

	∆R²	B	SE_B	β	t	p
Maximal Number of Steps in One Bout^a
Step 1	.285					<.001
(constant)		3.84	.42		9.20	<.001
NWS		.38	.15	.28	2.58	.011
Step 2	.031					.101
(constant)		3.81	.41		9.20	<.001
NWS		.15	.18	.11	.85	.400
dummy 1 pre-frail		−.13	.09	−.17	−1.46	.148
dummy 2 frail		−.29	.13	−.28	−2.17	.033
Step 3	.048					.024
(constant)		3.98	.41		9.75	<.001
NWS		−.70	.35	−.51	−1.98	.050
dummy 1 pre-frail		−.29	.10	−.39	−2.82	.006
dummy 2 frail		−.38	.16	−.38	−2.37	.020
dummy 1 x NWS		1.08	.46	.47	2.35	.021
dummy 2 x NWS		1.05	.40	.42	2.64	.010
total R² = .364 (N = 112; p = < .001)
Average Number of Steps per Bout^a
Step 1	.137					.007
(constant)		1.90	.25		7.67	<.001
NWS		.17	.09	.23	1.90	.056
Step 2	.002					.869
(constant)		1.90	.25		7.58	<.001
NWS		.14	.11	.19	1.27	.206
dummy 1 pre-frail		−.01	.05	−.02	−.15	.883
dummy 2 frail		−.04	.08	−.07	−.48	.633
Step 3	.051					.044
(constant)		1.99	.25		8.02	<.001
NWS		−.33	.21	−.45	−1.54	.126
dummy 1 pre-frail		−.10	.06	−.25	−1.59	.115
dummy 2 frail		−.08	.10	−.14	−.79	.430
dummy 1 x NWS		.63	.28	.51	2.27	.026
dummy 2 x NWS		.56	.24	.42	2.32	.022
total R² = .190 (N = 112; p = .008)
Cumulated PA
Step 1	.427					<.001
(constant)		62.08	7.31		8.50	<.001
NWS		2.48	2.57	.09	.96	.338
Step 2	.008					.461
(constant)		61.58	7.36		8.37	<.001
NWS		.20	3.19	.01	.06	.950
dummy 1 pre-frail		−1.61	1.54	−.11	−1.05	.298
dummy 2 frail		−2.82	2.34	−.14	− 1.20	.231
Step 3	.021					.139
(constant)		62.71	7.37		8.51	<.001
NWS		−6.07	6.35	−.23	−.96	.341
dummy 1 pre-frail		−3.05	1.87	−.21	−1.63	.106
dummy 2 frail		−.85	2.91	−.04	−.29	.772
dummy 1 x NWS		15.41	8.31	.34	1.85	.067
dummy 2 x NWS		4.21	7.19	.09	.59	.560
total R² = .457 (N = 112; p < .001)