Table 4. Reliability of instruments .

Instrument	Internal consistency	Test–retest time period	Coefficients	Inter-rater time period
I-APS	0.86 ADL domain= 0.85 Occupation/education= 0.75	NR1		NR
IMPACT-S	0.96	4 weeks	Total ICC= 0.94 Knowledge ICC2= 0.87 General tasks ICC= 0.72 Communication ICC= 0.75 Mobility ICC= 0.92 Self-care ICC=0.81 Domestic life ICC= 0.86 Interpersonal ICC= 0.86 Major life areas ICC= 0.81 Community life ICC= 0.78 Activities ICC= 0.93 Participation ICC= 0.90	NR
WHODASII	0.95	NR		NR
USER-P	Frequency: 0.65 Restrictions: 0.90 Satisfaction: 0.90	NR		NR
IPA	Perceived participation measure= 0.94 Perceived problems= 0.82	NR		NR
PM-PAC	Mobility= 0.85 Role functioning = 0.83 (29) Community, Social, and Civic Life= 0.89 Domestic Life = 0.76 Economic Life = 0.82 Interpersonal Relationships= 0.72 Communication= 0.79	1–15 days (mean = 4 days, 94% in 1–8 days)	Mobility= 0.85 Role functioning = 0.61 Community, Social, and Civic Life= 0.86 Domestic Life = 0.74 Economic Life = 0.62 Interpersonal Relationships= 0.75 Communication= 0.85	NR

¹. Not Reported

². Intraclass correlation coefficient