Table 4.

Brief pain inventory (BPI) scores before and after commencing ketamine.

	n	Mean	SD	Min.	Max.	P-value	% Reduction
Highest pain severity
Pre-Ketamine	73	9.55	0.73	8	10
Post-Ketamine	73	6.64	2.64	0	10	<0.0001	−30.47
Lowest pain severity
Pre-Ketamine	72	5.79	2.67	0	10
Post-Ketamine	73	3.63	2.49	0	10	<0.0001	−37.31
Average pain severity
Pre-Ketamine	73	7.43	1.82	3	10
Post-Ketamine	73	4.82	2.31	0	10	<0.0001	−35.13
Impact of pain on
General activity
Pre-Ketamine	72	8.62	1.64	5	10
Post-Ketamine	71	7.39	2.86	0	10	0.013	−14.27
Mood
Pre-Ketamine	73	7.62	2.61	1	10
Post-Ketamine	70	4.04	3.06	0	10	<0.0001	−46.98
Walking ability
Pre-Ketamine	71	7.62	2.61	1	10
Post-Ketamine	73	4.04	3.06	0	10	<0.0001	−14.27
Normal work
Pre-Ketamine	73	8.15	1.96	4	10
Post-Ketamine	73	5.27	3.04	0	10	<0.0001	−35.34
Relations with other people
Pre-Ketamine	73	6.68	3.28	0	10
Post-Ketamine	73	4.03	2.99	0	10	<0.0001	−39.67
Sleep
Pre-Ketamine	73	7.9	2.36	2	10
Post-Ketamine	73	4.95	3.48	0	10	<0.0001	−37.34
Enjoyment of life
Pre-Ketamine	73	8.03	1.9	3	10
Post-Ketamine	73	4.78	2.84	0	10	<0.0001	−40.47

N, number of participants; SD, standard deviation.