Table 4
Diagnostic accuracy of mean and systolic blood pressure 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. | ||||||
| BP, Blood pressure; LR+, positive likelihood ratio; LR−, negative likelihood ratio; NPV, negative predictive value; PPV, positive predictive value; Sn, sensitivity; Sp, specificity. | ||||||
| Systolic BP < 48 mm Hg | ||||||
| 3 hours | 100 (100 to 100) | 14 (7 to 21) | 15 (8 to 22) | 100 (100 to 100) | 1.17 | 0 |
| 10 hours | 92 (87 to 97) | 39 (30 to 49) | 44 (35 to 54) | 90 (85 to 96) | 1.52 | 0.21 |
| All observations | 93 (90 to 96) | 35 (30 to 41) | 24 (19 to 28) | 96 (93 to 98) | 1.43 | 0.21 |
| Systolic BP < 40 mm Hg | ||||||
| 3 hours | 69 (60 to 78) | 51 (41 to 61) | 18 (10 to 26) | 91 (86 to 97) | 1.42 | 0.60 |
| 10 hours | 81 (74 to 88) | 65 (56 to 74) | 55 (45 to 64) | 87 (80 to 93) | 2.30 | 0.29 |
| All observations | 76 (71 to 81) | 68 (62 to 73) | 34 (28 to 39) | 93 (90 to 96) | 2.35 | 0.36 |
| Mean BP < 30 mm Hg | ||||||
| 3 hours | 62 (57 to 71) | 58 (49 to 68) | 19 (11 to 26) | 91 (85 to 97) | 1.48 | 0.66 |
| 10 hours | 62 (53 to 71) | 82 (74 to 89) | 64 (55 to 73) | 81 (73 to 88) | 3.40 | 0.46 |
| All observations | 59 (54 to 65) | 77 (72 to 82) | 36 (30 to 41) | 90 (86 to 93) | 2.56 | 0.53 |
| Mean BP ⩽ gestation (in weeks) mm Hg | ||||||
| 3 hours | 38 (29 to 48) | 76 (68 to 85) | 20 (12 to 28) | 89 (83 to 95) | 1.62 | 0.81 |
| 10 hours | 27 (19 to 35) | 92 (86 to 97) | 63 (53 to 72) | 71 (62 to 79) | 3.2 | 0.8 |
| All observations | 30 (25 to 35) | 88 (84 to 91) | 34 (29 to 39) | 85 (81 to 89) | 2.40 | 0.80 |
