Table VIII.

Internal consistency of the Oxford hip score. The mean inter-item correlation is 0.88 and the overall Cronbach’s alpha is 0.99

Question	Content*	Obs.	Mean (se) score	Item total correlation	Alpha if item removed
1	Usual level of hip pain	1980	3.55 (0.04)	0.94	0.93
2	Trouble with washing and drying	1988	3.90 (0.03)	0.95	0.94
3	Trouble with transport	1989	3.77 (0.04)	0.95	0.94
4	Putting on socks/stockings/tights	1988	3.63 (0.04)	0.93	0.91
5	Doing household shopping alone	1978	3.93 (0.04)	0.94	0.93
6	Walking time before severe pain	1986	3.84 (0.04)	0.94	0.93
7	Difficulty going up stairs	1963	3.71 (0.04)	0.95	0.94
8	Pain on standing up from sitting	1973	3.78 (0.04)	0.96	0.95
9	Limping when walking	1969	3.61 (0.04)	0.91	0.89
10	Sudden, severe pain from hip	1969	3.76 (0.04)	0.94	0.92
11	Work interference due to pain	1968	3.64 (0.04)	0.97	0.96
12	Pain in bed at night	1975	3.74 (0.04)	0.93	0.91

* the wording of each item reported in this table is in abridged form