Table 1. ECOG performance status score agreements.

	Weighted κ-coefficient	Agreements, % (n)	Physician rates worse than patient, % (n)	Physician rates better than patient, % (n)
Overall	0.41 (0.37–0.44)	56.8 (806)	13.8 (195)	29.4 (417)
Gender
Male	0.42 (0.38–0.47)	58.1 (483)	15.2 (126)	26.7 (222)
Female	0.38 (0.33–0.44)	55.0 (323)	11.8 (69)	33.2 (195)
Age group
Age <50	0.34 (0.26–0.43)	57.3 (193)	10.1 (34)	32.6 (110)
Age 50–70	0.41 (0.36–0.46)	58.7 (436)	14.3 (106)	27.1 (201)
Age 70+	0.43 (0.36–0.50)	52.4 (177)	16.3 (55)	31.4 (106)
Cancer type
Aggressive	0.37 (0.31–0.42)	49.2 (272)	11.9 (66)	39.0 (216)
Non-aggressive	0.42 (0.37–0.47)	61.7 (534)	14.9 (129)	23.3 (201)

Abbreviation: ECOG=Eastern Cooperative Oncology Group.