Table 2

Sensitivity and specificity of the single statements of DART V.2.0

Statements or questions of DART	Number of answers (n)	Missing data	True positive	False positive	True negative	False negative	Prevalence of the Rf (%)	Sensitivity (%)	Specificity (%)	Positive predictive value (%)	Negative predictive value (%)
I have a restricted kidney function/kidney dysfunction/kidney disease	31*	0	10	1	4	16	84	38	80	90	20
I have a liver disease/liver dysfunction	NA*	NA	NA	NA	NA	NA	Na	Na	NA	NA	Na
I have a heart weakness/heart performance weakness	30*	1	8	8	12	2	33	80	60	50	86
I am suffering from a chronic respiratory disease	157	7	14	1	129	13	17	52	99	93	91
I am suffering from diabetes	158	6	23	0	129	6	18	79	100	100	96
I have troubles remembering things or tend to forget things	157	7	9	26	116	6	10	60	82	26	95
I take more than five drugs every day, prescribed by my physician	144	20	10	12	84	38	33	21	88	46	69
Sleeping pills	147	17	15	10	121	1	11	93	92	60	99
Cortisone or other steroids	149	15	11	2	129	7	12	61	98	85	95
Antiepileptic drugs	149	15	0	0	149	0	00	NA	100	NA	NA
Oral anticoagulants	149	15	21	5	123	0	14	100	96	81	100
Tricyclic antidepressants	149	15	2	2	145	0	01	100	99	50	100
Drugs for rheumatism/inflammation	149	15	7	18	120	4	07	64	87	28	97
Drugs for drainage (diuretics)	149	15	26	9	89	25	34	51	91	74	78
Digoxin	149	15	1	0	147	1	01	50	100	100	99
Anticholinergic drugs	149	15	1	0	146	2	02	33	100	100	99
Insulin/drugs used in diabetes	148	16	16	2	127	3	13	84	98	89	98
Do you sometimes forget to take your medicine?
BMQ	54	110	39	8	3	4	20	91	27	83	43
I use some of these application forms: spray for inhalation, skin patch, syringe for self-injection	129	35	27	12	84	6	26	82	88	96	93
Mean value								67	88	74	86
Range								21–100	27–100	26–100	20–100

* Rephrased statements for DART V.2.0, revalidated with 31 patients.
BMQ, Beliefs about Medicines Questionnaire; DART, Drug-Associated Risk Tool; NA, not applicable; Rf, risk factor.