Diagnostic accuracy of central-peripheral temperature difference (CPTd) and capillary refill time (CRT) for prediction of low superior vena cava flow in preterm infants < 30 weeks gestation
| Sn | Sp | PPV | NPV | LR+ | LR− | |
|---|---|---|---|---|---|---|
| Values in parentheses are 95% confidence intervals. | ||||||
| LR+, Positive likelihood ratio; LR−, negative likelihood ratio; NPV, negative predictive value; PPV, positive predictive value; Sn, sensitivity; Sp, specificity. | ||||||
| CPTd ⩾ 2°C | ||||||
| 3 hours | 29 (15 to 42) | 78 (65 to 90) | 20 (8 to 32) | 85 (74 to 96) | 1.29 | 0.92 |
| 10 hours | 41 (27 to 55) | 66 (52 to 79) | 41 (27 to 55) | 66 (52 to 79) | 1.19 | 0.90 |
| All observations | 40 (32 to 48) | 69 (61 to 77) | 23 (16 to 30) | 83 (77 to 90) | 1.30 | 0.87 |
| CRT ⩾ 3 seconds | ||||||
| 3 hours | 54 (45 to 63) | 79 (72 to 86) | 23 (16 to 31) | 93 (89 to 98) | 2.55 | 0.58 |
| 10 hours | 59 (50 to 68) | 75 (67 to 82) | 51 (42 to 60) | 80 (73 to 87) | 2.33 | 0.55 |
| All observations | 55 (50 to 60) | 80 (76 to 84) | 33 (29 to 38) | 91 (88 to 94) | 2.78 | 0.56 |
| CRT ⩾ 4 seconds | ||||||
| 3 hours | 38 (30 to 47) | 93 (88 to 97) | 38 (30 to 47) | 93 (88 to 97) | 5.24 | 0.66 |
| 10 hours | 26 (18 to 33) | 97 (93 to 100) | 77 (70 to 84) | 74 (67 to 82) | 7.44 | 0.77 |
| All observations | 29 (24 to 33) | 96 (94 to 98) | 55 (50 to 60) | 88 (85 to 91) | 6.84 | 0.75 |