Survival rate in nasopharyngeal carcinoma improved by high caseload volume: a nationwide population-based study in Taiwan

Table 4 10-year survival of NPC patients in different propensity score strata; low/medium-volume vs. high-volume physicians^a

Propensity score stratum	Low/medium-volume physician group			High-volume physician group			p
	No.	% of stratum	Survival rate (%)	No.	% of stratum	Survival rate (%)
1	193	79	56	51	21	75	0.004
2	191	78	59	52	22	74	0.029
3	173	70	57	74	30	75	0.013
4	145	58	64	104	42	76	0.021
5	116	48	69	126	52	76	0.28
Total	818		61	407	33	75	< 0.001

a. Stratum 1 had the strongest propensity for low/medium physicians; stratum 5, for high-volume physicians.
b. Conchran-Mantel-Haenszel statistics; adjusted odds ratio = 0.54, 95% confidence interval = 0.41-0.70.

ISSN: 1748-717X