Table 3.

Multilevel regression analyses for change in performance across the years for female runners according to age group (model 1), with correction for multiple participations (model 2), and with correction for multiple participation and age of athletes (model 3)

Age group, years	Model	β	SE (β)	Standard β	T	P
25–29	1	−0.333	0.241	−0.172	−1.383	0.172
	2	−0.333	0.241	−0.172	−1.383	0.172
	3	−0.314	0.240	−0.162	−1.307	0.196
30–34	1	−0.271	0.204	−0.153	−1.327	0.189
	2	−0.271	0.204	−0.153	−1.327	0.189
	3	−0.284	0.204	−0.161	−1.394	0.168
35–39	1	−0.071	0.182	−0.045	−0.388	0.699
	2	−0.071	0.182	−0.045	−0.388	0.699
	3	−0.081	0.182	−0.052	−0.445	0.658
40–44	1	0.470	0.139	0.369	3.391	0.001
	2	0.470	0.139	0.369	3.391	0.001
	3	0.464	0.138	0.364	3.364	0.001
45–49	1	0.192	0.118	0.187	1.623	0.109
	2	0.192	0.118	0.187	1.623	0.109
	3	0.212	0.112	0.206	1.895	0.062
50–54	1	0.113	0.117	0.112	0.966	0.337
	2	0.113	0.117	0.112	0.966	0.337
	3	0.112	0.117	0.112	0.964	0.338

Abbreviation: SE, standard error.