A Population Survey in Italy Based on the ICF Classification: Recognizing Persons with Severe Disability

Table 2

Paired-sample t-test between A&P qualifiers of capacity, performance-WPS, and performance (𝑁=200).

Domain and index		Activities and participation-mean (SD)		Paired sample t-test
Full A&P set of categories	Extension	Capacity	78.5 (15.5)	6.0**; 28.8**
		Performance-WPS	77.5 (16.0)
		Performance	54.8 (17.0)
	Severity	Capacity	55.6 (18.1)	10.8**; 29.7**
		Performance-WPS	49.8 (18.7)
		Performance	27.4 (15.2)
	D1—learning and applying knowledge	Extension	Capacity	64.5 (24.3)	4.7**; 5.9**
Performance-WPS			63.2 (24.6)
Performance			59.0 (26.8)
Severity		Capacity	42.8 (26.4)	4.6**; 10.0**
		Performance-WPS	40.8 (26.8)
		Performance	30.4 (23.0)
D3—communication	Extension	Capacity	82.9 (26.4)	2.1*; 5.6**
		Performance-WPS	82.3 (27.2)
		Performance	78.0 (30.7)
	Severity	Capacity	58.9 (30.9)	4.8**; 10.4**
		Performance-WPS	55.8 (31.2)
		Performance	41.1 (28.0)
D4—mobility	Extension	Capacity	76.8 (29.9)	3.6**; 13.2**
		Performance-WPS	75.6 (30.4)
		Performance	59.6 (27.6)
	Severity	Capacity	51.1 (33.5)	9.8**; 8.0**
		Performance-WPS	38.1 (29.0)
		Performance	27.4 (21.2)
D5—self care	Extension	Capacity	90.5 (18.1)	2.6*; 36.2**
		Performance-WPS	89.7 (18.8)
		Performance	14.8 (25.5)
	Severity	Capacity	62.6 (29.8)	7.6**; 25.2**
		Performance-WPS	53.3 (29.0)
		Performance	3.2 (10.3)
D6—domestic life	Extension	Capacity	91.2 (24.8)	NA; 29.1**
		Performance-WPS	91.2 (24.8)
		Performance	32.7 (26.6)
	Severity	Capacity	87.6 (27.5)	2.7**; 26.8**
		Performance-WPS	86.2 (28.1)
		Performance	30.0 (26.6)
D7—interpersonal interactions and relationships	Extension	Capacity	76.3 (29.3)	1.0; 7.1**
		Performance-WPS	76.5 (29.4)
		Performance	67.6 (32.5)
	Severity	Capacity	45.3 (35.0)	1.0; 10.0**
		Performance-WPS	44.8 (35.1)
		Performance	27.2 (28.1)
D8&9—major and social life areas	Extension	Capacity	84.4 (25.6)	5.1**; 16.9**
		Performance-WPS	81.5 (26.2)
		Performance	51.2 (29.3)
	Severity	Capacity	68.4 (30.7)	6.2**; 17.6**
		Performance-WPS	61.6 (32.3)
		Performance	27.9 (30.1)

t-test was not executed for the pair capacity and performance-WPS in D6—domestic life because the standard error of the difference was = 0. *𝑃<0.05; **𝑃<0.01.