Development of a rapid point-of-care patient reported outcome measure for cataract surgery in India

Table 3 Overall Model Fit

Combined pre- and post-operative data					Pre-operative only
	Separation	Reliability	Mean	SD	Mean	SD
Person Ability	1.97	0.80	3.41	2.23	1.92	1.91
Item Difficulty	5.87	0.97	0.00^a	0.77	0.00	0.78

SD standard deviation
^athe mean item difficulty was set at 0.00 and the data were fit around this fixed value

ISSN: 1477-7525