Simple Bedside Predictors of Survival after Percutaneous Gastrostomy Tube Insertion

Table 3

Specificity, sensitivity, PPV, and NPV of several cutoff point values according to ROC curve analysis for short-term mortality and long-term survivals.

Parameter	ROC curve	Specificity (%)	Sensitivity (%)	PPV (%)	NPV (%)
Albumin (g/dl)	0.65
3.3–3.6		90–100	10–20	87–100	25
3–3.29		74–88	25–39	83–87	27
2.6–2.9		50–68	48–72	83	29–35
2.3–2.59		28–48	76–89	80–83	38–44
<2.3		10–25	90–100	77–80	50–100
Hemoglobin (g/dl)	0.64
11.7–13.6		81–98.5	10–27	83–95	25
9.8–11.6		63–78	33–60	83	26–33
8.5–9.7		30–58	65–87	80–83	33–41
<8.5		15–25	90–100	77–80	48–100
Creatinine (mg/dl)	0.63
0.35–0.5		85–99	14–22	75–83	24
>0.5–0.63		61–83	26–53	83	26–29
0.65–0.84		40–59	58–79	82	30–37
0.85–0.99		30–38	82–88	80	39–42
>1		5–20	90–100	77–80	50–100
CRP (mg/L)	0.67
1.8–17.6		90–100	20–25	90–100	24–27
>18–41		70–89	27–53	85–89	27–31
42–64		59–69	54–66	85	31–35
>73–151		30–58	71–90	80–85	38–45
>155		15–25	90–100	77–80	50–100
CRP-to-albumin ratio	0.68
1–7		90–100	10–30	92–100	24–28
>7–17		70–88	30–60	86–89	28–35
>17–33		50–67	61–80	85	35–44
35–60		28–48	81–90	80–84	44–50
>60		10–26	91–100	77–80	55–100