Table 5. Cox regression analysis.

	Hazard Ratio	CI 95%
Age	0.990	0.941–1.042
Stage KDOQI	2.661	1.930–3.668
Very low parents‘ education level	2.725	1.713–4.336
Very low living conditions score	1.303	0.772–2.197
Very low income score	0.657	0.402–1.074
Rural	0.948	0.456–1.973
Time to reference centre > 6 h	0.979	0.606–1.582