. 2018 Jul 7;17:92. doi: 10.1186/s12904-018-0342-0

Table 6.

Discriminative validity

ECOG Performance Status	PSBS sum score t1^ab	PSBS sum score t2^ac
0. Normal activity	7.75 (3.86)	8.75 (6.18)
1. Able to walk, light activity possible	10.06 (4.13)	8.80 (3.38)
2. Self-care possible; able to walk < 50% of daytime	7.36 (3.05)	11.65 (3.41)
3. Limited self-care; < 50% bedridden	10.35 (3.33)	11.70 (4.36)
4. In need of care; bedridden	12.61 (3.68)	12.90 (3.70)

^aMean (SD)

^bt1_3 (= measure 3, day 1): (χ 2 (4) = 121.91; p < .001)

^ct7_3 (day 7, measure 3 (evening): (χ 2 (4) = 57.68; p < .001)