Table 4.
Univariate Analysis of Preventable and Possibly Preventable Events Versus Controls
| Cases (n=69), n (%) | Controls (n=236), n (%) | P | |
|---|---|---|---|
| Study type | 0.33 | ||
| Transthoracic | 64 (93) | 226 (96) | |
| Transesophageal | 4 (6) | 9 (4) | |
| Epicardial | 1 (1) | 1 (<1) | |
| Age at examination | <0.001 | ||
| <30 d | 31 (45) | 30 (13) | |
| 30 d–<1 y | 7 (10) | 33 (14) | |
| 1–5 y | 20 (29) | 43 (18) | |
| ≥6 y | 11 (16) | 130 (55) | |
| Weight, kg | <0.001 | ||
| <5 | 33 (48) | 45 (19) | |
| 5–20 | 24 (35) | 57 (24) | |
| >20 | 12 (17) | 130 (55) | |
| Unknown | 0 (0) | 4 (2) | |
| Race | 0.83 | ||
| White | 46 (67) | 153 (65) | |
| Black | 3 (4) | 10 (4) | |
| Hispanic | 6 (9) | 18 (8) | |
| Asian | 2 (3) | 5 (2) | |
| Other | 6 (9) | 16 (7) | |
| Unknown | 6 (9) | 34 (14) | |
| Premature | 0.095 | ||
| Yes | 6 (9) | 8 (3) | |
| No | 63 (91) | 228 (97) | |
| Study location | <0.001 | ||
| Echocardiography laboratory | 22 (32) | 152 (64) | |
| CICU | 21 (30) | 17 (7) | |
| NICU | 10 (14) | 13 (6) | |
| PICU | 2 (3) | 8 (3) | |
| Recovery suite | 6 (9) | 5 (2) | |
| Other | 8 (12) | 41 (17) | |
| Junior staff | 0.19 | ||
| Yes | 20 (29) | 49 (21) | |
| No | 49 (71) | 187 (79) | |
| Day of week | 0.34 | ||
| Weekday | 61 (88) | 217 (92) | |
| Weekend (saturday or sunday) | 8 (12) | 19 (8) | |
| Time of day study performed | 0.008 | ||
| 7 AM–12:59 PM | 28 (41) | 135 (57) | |
| 1 PM–6:59 PM | 33 (48) | 92 (39) | |
| 7 PM–6:59 AM | 8 (12) | 9 (4) | |
| Time of day study interpreted | 0.010 | ||
| 7 AM–12:59 PM | 19 (28) | 78 (33) | |
| 1 PM–6:59 PM | 38 (55) | 146 (62) | |
| 7 PM–6:59 AM | 11 (16) | 10 (4) | |
| Unknown | 1 (1) | 2 (1) | |
| Frequency diagnosis observed in laboratory | <0.001 | ||
| Frequent | 13 (19) | 134 (57) | |
| Less frequent | 16 (23) | 65 (28) | |
| Rare | 34 (49) | 36 (15) | |
| Very rare | 6 (9) | 1 (<1) | |
| Anatomic complexity | <0.001 | ||
| Low | 13 (19) | 142 (60) | |
| Moderate | 29 (42) | 59 (25) | |
| High | 27 (39) | 35 (15) |
CICU indicates cardiac intensive care unit; NICU, neonatal intensive care unit; and PICU, pediatric intensive care unit.