Table 3

Hip registries association with revision burden

	Main model		Sensitivity test
	Registry period for non-registry countries
	1999–2018		1994–2018		2003–2018		2006–2018		2012–2018
	Coef.	SE	Coef.	SE	Coef.	SE	Coef.	SE	Coef.	SE
Intercept (β₀)	0.1917***	0.0206	0.1835***	0.0206	0.1959***	0.0205	0.1978***	0.0205	0.1983***	0.0205
Registry country (β₁)	−0.0457**	0.0223	−0.0367	0.0224	−0.0512**	0.0223	−0.0541**	0.0223	−0.0548**	0.0222
Registry periods (β₂)	0.0246***	0.0061	0.0353***	0.0062	0.0143**	0.0063	0.0065	0.0064	0.0053	0.0077
Trend (β₃)	−0.0008***	0.0002	−0.0009***	0.0001	−0.0006***	0.0002	−0.0005***	0.0002	−0.0005***	0.0001
Registry period of registry countries (β₄)	−0.0380***	0.0067	−0.0470***	0.0068	−0.0301***	0.0069	−0.0236***	0.0071	−0.0235***	0.0082
Hausman test
Test statistics	1.77		1.65		1.93		2.07		2.10
Hausman test p value	0.41		0.44		0.38		0.36		0.35