Table 4.

Risk assessment total scores (number of risk factors present) and diagnostic accuracy statistics with 95% confidence intervals

Risk assessment (Total score)	Suicides	Non-suicides	Sensitivity, % (95% CI)	Specificity, % (95% CI)	Positive predictive value, % (95% CI)	Negative predictive value, % (95% CI)	Likelihood ratio, + (95% CI)	Likelihood ratio, − (95% CI)	Diagnostic OR (95% CI)
0	2	1113	98 (91–100)	8 (8–9)	1 (0–1)	100 (99–100)	1.1 (1.0–1.1)	0.3 (0.1–1.2)	3.5 (0.9–14.3)
1	3	1748	94 (86–98)	21 (20–22)	1 (1–1)	100 (100–100)	1.2 (1.1–1.3)	0.3 (0.1–0.7)	4.0 (1.6–9.9)
2	7	2042	85 (76–92)	36 (35–37)	1 (1–1)	100 (100–100)	1.3 (1.2–1.5)	0.4 (0.2–0.7)	3.2 (1.7–5.9)
3	8	1909	75 (64–84)	50 (49–51)	1 (1–1)	100 (100–100)	1.5 (1.3–1.7)	0.5 (0.3–0.7)	3.02 (1.8–5.0)
4	8	1727	65 (54–76)	62 (62–63)	1 (1–1)	100 (99–100)	1.7 (1.5–2.0)	0.5 (0.4–0.7)	3.1 (2.0–5.0)
5	12	1443	51 (39–62)	73 (72–74)	1 (1–1)	100 (99–100)	1.9 (1.5–2.3)	0.7 (0.5–0.8)	2.8 (1.8–4.3)
6	10	1161	38 (28–50)	81 (81–82)	1 (1–2)	100 (99–100)	2.1 (1.6–2.7)	0.8 (0.6–0.9)	2.7 (1.73–4.3)
7	10	836	26 (17–37)	88 (87–88)	1 (1–2)	100 (99–100)	2.1 (1.4–3.0)	0.8 (0.7–1.0)	2.5 (1.5–4.1)
8	9	712	15 (8–24)	93 (92–93)	1 (1–2)	100 (99–100)	2.0 (1.2–3.5)	0.9 (0.8–1.0)	2.23 (1.2–4.1)
9	4	427	10 (4–19)	96 (96–96)	1 (1–3)	100 (99–100)	2.4 (1.2–4.7)	0.9 (0.8–1.0)	2.6 (1.2–5.3)
10	4	291	5 (1–12)	98 (98–98)	1 (1–4)	100 (99–100)	2.5 (0.9–6.6)	1.0 (0.9–1.0)	2.6 (0.9–7.1)
11	3	167	1 (0–7)	99 (99–99)	1 (0–5)	100 (99–100)	1.7 (0.2–11.7)	1.0 (1.0–1.0)	1.6 (0.2–12.1)
12	1	64	0 (0–4)	1 (1–1)	0 (0–9)	99 (99–100)	0 (0–0)	1.0 (1.0–1.0)	NA
13	0	28	NA	NA	NA	NA	NA	NA	NA
14	0	10	NA	NA	NA	NA	NA	NA	NA