Table 5.
Prognostic Value of Single and Two-Stage Perioperative Blood Pressure Screens
| Single Blood Pressure Screen for Predicting Elevated Primary Care Blood Pressure | ||||||
|---|---|---|---|---|---|---|
| Referral Threshold (mmHg) |
Incidence of Referral (%) |
Sensitivity (95% CI) |
Specificity (95% CI) |
Positive Predictive Value (95% CI) |
Negative Predicitive Value (95% CI) |
|
| Systolic Blood Pressure Screen | DOS SBPa ≥ 140 | 1119/2807 (39.9%) | 62.5% (59.0, 66.0) | 68.5% (66.3, 70.5) | 42.1% (39.2, 45.1) | 83.3% (81.4, 85.0) |
| DOS SBP ≥ 146 | 766/2807 (27.3%) | 48.6% (45.0, 52.2) | 80.5% (78.8, 82.2) | 47.8% (44.2, 51.4) | 81.0% (79.3, 82.7) | |
| Diastolic Blood Pressure Screen | DOS DBPb ≥ 90 | 236/2807 (8.4%) | 25% (20.0, 30.5) | 93.4% (92.4, 94.3) | 29.2% (23.5, 35.5) | 91.9% (90.8, 93.0) |
| DOS DBP ≥ 92 | 162/2807 (5.8%) | 18.8% (14.4, 24.0) | 95.7% (94.8, 96.4) | 32.1% (25.0, 39.9) | 91.5% (90.4, 92.6) | |
| Two-Stage Blood Pressure Screen for Predicting Elevated Primary Care Blood Pressure | ||||||
| Systolic Blood Pressure Screen | Preoperative SBP ≥ 140 and DOS SBP ≥ 140 | 180/1312 (13.7%) | 32.7% (27.6, 38.1) | 92.4% (90.6, 94.0) | 58.3% (50.8, 65.6) | 80.9% (78.5, 83.2) |
| Preoperative SBP ≥ 140 and DOS SBP ≥ 146 | 127/1312 (9.7%) | 26.8% (22.0, 32.0) | 95.9% (94.4, 97.0) | 67.7% (58.9, 75.7) | 80.2% (77.8, 82.4) | |
| Diastolic Blood Pressure Screen | Preoperative DBP ≥ 90 and DOS DBP ≥ 90 | 31/1312 (2.4%) | 10.2% (5.4, 17.1) | 98.4% (97.5, 99.0) | 38.7% (21.9, 57.8) | 91.7% (90.1, 93.2) |
| Preoperative DBP ≥ 90 and DOS DBP ≥ 92 | 19/1312 (1.4%) | 8.5% (4.1, 15.0) | 99.2% (98.6, 99.7) | 52.6% (28.9, 75.6) | 91.6% (90.0, 93.1) | |
a
DOS=Day of Surgery; SBP=Systolic Blood Pressure;
b
DBP=Diastolic Blood Pressure