Table 2

Results of the seven patients who completed the n of 1 trials: outcome measures, recommendations, drugs after three months, and confidence

Patient No	Joint	Most important complaint	Function test	Median difference N − P* (median N, median P)†					Proportion of pairs N>P for the primary outcome measures			Recommendation	Drug treatment after 3 months	δ Confidence GP (choice before, choice after)‡
Patient No	Joint	Most important complaint	Function test	Total diary score	Individual main complaint	Pain	Satisfaction	Function test (seconds)	Total diary score	Individual main complaint	Pain	Recommendation	Drug treatment after 3 months	δ Confidence GP (choice before, choice after)‡
H, hip; K, knee; W, walking; ST, walking stairs; S, sitting and standing up; N, NSAID; P, paracetamol.
*Negative scores favour NSAIDs; †scores range between 0 = no complaints and 6 = unbearable complaints for the total diary score and the individual main complaint, between 0 = no pain and 10 = very severe pain for the intensity of pain, and between 0 = very satisfied and 6 = very dissatisfied for the satisfaction with drugs; ‡confidence of general practitioner in the preferred drug at the start of the study minus at the end of the study. Positive scores indicate that the general practitioner is more certain after the study; §walking upstairs; walking downstairs; ¶data of only four pairs could be compared.
1	H	Pain during standing up from a chair or couch	W	0 (3, 3)	0 (3, 3)	−1 (6, 7)	0 (2, 2)	0.5 (10.5, 10.6)	1/5	1/5	3/5	P	N	0 (N, P)
3	K	Pain during walking	W	−0.5 (3, 3.5)	0 (4, 4)	0 (6, 6)	0 (3, 3)	0 (12.0, 11.7)	3/5	0/5	0/5	P	N and P	1 (N, P)
4	K	pain during walking	W	0 (2.5, 2.5)	0 (3, 3)	0 (7, 7)	0 (3, 2)	−0.7 (16.0, 16.9)	2/5	2/5	2/5	P	N	0 (N, P)
5	K	Pain during sleeping	W	0 (0, 0)	0 (0, 0)	0 (0, 0)	0 (0, 0)	0.2 (6.8, 6.6)	0/5	0/5	2/5	P	P	2 (N, P)
6	K	Pain during standing up from the toilet	ST	−1 (3, 4)	−1 (3, 4)	0 (7, 8)	0 (3, 5)	−0.8; −2.0 (12.2, 13.2; 17.7, 19.4)§	4/5	4/5	2/5	N	N	2 (N, N)
7¶	K	Pain during standing up from a chair	S	−1 (1, 2)	−0.5 (1, 2)	−3 (3, 5.5)	0.5 (1.5, 1)	0.8 (18.6, 18.9)	3/4	2/4	3/4	P	N	1 (P, P)
9	K	Pain during standing	W	0 (3, 3)	0 (3, 3)	−1 (6, 7)	0 (2, 2)	−3.6 (20.2, 22.7)	1/5	1/5	3/5	P	N (and P)	0 (P, P)