Frequencies, proportions, and rates of patients who underwent head imaging within the first month of life and those who had ICH by select patient characteristics
| . | Total . | Head imaging within first 30 d of life . | ICH ever . | ICH within first 30 d of life . | |||
|---|---|---|---|---|---|---|---|
| # (% of total) . | # (% with head imaging within first 30 d of life) . | Rate per 100 ITs (95% CI) . | # (% of ICH) . | Rate per 100 ITs (95% CI) . | # (% with ICH within first 30 d of life) . | Rate per 100 ITs (95% CI) . | |
| All | 883 (100%) | 242 (27.4%) | 27.4 (24.5-30.3) | 68 (7.7%) | 7.7 (5.9-9.5) | 24 (2.7%) | 2.7 (1.6-3.8) |
| HA | 691 (78.3) | 201 (83.1%) | 29.1 (25.7-32.5) | 57 (83.8%) | 8.2 (6.2-10.3) | ∗ | ∗ |
| HB | 192 (21.7) | 41 (16.9%) | 21.4 (15.6-27.2) | 11 (16.2%) | 5.7 (2.4-9.0) | ∗ | ∗ |
| Age of diagnosis | |||||||
| <1 mo | 625 (74.8%) | 220 (93.2%) | 35.2 (31.5-38.9) | 53 (79.1%) | 8.5 (6.3-10.7) | 22 (91.7%) | 3.5 (2.1-5.0) |
| ≥1 mo | 211 (25.2%) | 16 (6.8%) | 7.6 (4.0-11.2) | 14 (20.9%) | 6.6 (3.3-10.0) | ∗ | 0.9 (0 to 2.3) |
| Unknown | 47 (-) | 6 (-) | 1 (-) | ∗ | |||
| Severity | |||||||
| Severe | 550 (63.1%) | 172 (71.7%) | 31.3 (27.4-35.1) | 53 (77.9%) | 9.6 (7.2-12.1) | 17 (70.8%) | 3.1 (1.6-4.5) |
| Moderate/Mild | 322 (36.9%) | 68 (28.1) | 21.1 (16.7-25.6) | 15 (22.1%) | 4.7 (2.4-7.0) | 7 (29.2%) | 2.2 (0.6-3.8) |
| Moderate | 189 (21.7%) | 46 (19.2%) | 24.3 (18.2-30.5) | ||||
| Mild | 133 (15.3%) | 22 (9.2%) | 16.5 (10.2-22.9) | ||||
| Unknown | 11 (-) | 2 (-) | 4 (-) | ||||
| FH | |||||||
| No | 236 (27.6%) | 67 (28.4%) | 28.4 (22.6-34.1) | 25 (36.8%) | 10.6 (6.7-14.5) | 8 (33.3%) | 3.4 (1.1-5.7) |
| Yes | 619 (72.4%) | 169 (71.6%) | 27.3 (23.8-30.8) | 43 (63.2%) | 6.9 (4.9-8.9) | 16 (66.7%) | 2.6 (1.3-3.8) |
| Unknown | 28 (-) | 6 (-) | 0 (-) | 0 (-) | |||
| Method of delivery | |||||||
| Cesarean delivery | 226 (30.4%) | 19 (10.8%) | 8.4 (4.8-12.0) | 12 (21.4%) | 5.3 (2.4-8.2) | ∗ | ∗ |
| Vaginal delivery | 517 (69.6%) | 157 (89.2%) | 30.4 (26.4-34.3) | 44 (78.6%) | 8.5 (6.1-10.9) | 17 (77.3%) | 3.3 (1.8-4.8) |
| Unknown | 140 (-) | 66 (-) | 12 (-) | ∗ | |||
| ICH history | |||||||
| No | 810 (92.3%) | 204 (85.7%) | 25.2 (22.2-28.2) | N/A | N/A | N/A | N/A |
| Yes | 68 (7.7%) | 34 (14.3%) | 50.0 (38.1-61.9) | 68 (100.0%) | N/A | 24 (100.0%) | 35.3 (23.9-46.7) |
| Unknown | 5 (-) | 4 (-) | N/A | N/A | N/A | N/A | |
| Age of first ICH | |||||||
| <1 mo | 24 (35.3%) | 23 (67.6%) | 95.8 (87.8-100.0) | 24 (35.3%) | N/A | 24 (100.0%) | N/A |
| ≥1 mo | 44 (64.7%) | 11 (32.3%) | 25.0 (12.2-37.8) | 44 (64.7%) | N/A | N/A | N/A |
| ICH associated with trauma | |||||||
| No | 26 (52.0%) | 17 (65.4%) | 65.4 (47.1-83.7) | 26 (52.0%) | N/A | 11 (57.9%) | 42.3 (23.3-61.3) |
| Yes | 24 (48.0%) | 9 (34.6%) | 37.5 (18.1-56.9) | 24 (48.0%) | N/A | 8 (42.1%) | 33.3 (14.5-52.2) |
| Unknown | 18 (-) | 8 (-) | 18 (-) | 5 (-) | ∗ | ||
| Continuous prophylaxis when ICH occurred | |||||||
| No | 57 (87.7%) | ∗ | ∗ | 57 (87.7%) | N/A | ∗ | ∗ |
| Yes | 8 (12.3%) | ∗ | ∗ | 8 (12.3%) | N/A | ∗ | ∗ |
| Unknown | 3 (-) | 3 (-) | |||||
| . | Total . | Head imaging within first 30 d of life . | ICH ever . | ICH within first 30 d of life . | |||
|---|---|---|---|---|---|---|---|
| # (% of total) . | # (% with head imaging within first 30 d of life) . | Rate per 100 ITs (95% CI) . | # (% of ICH) . | Rate per 100 ITs (95% CI) . | # (% with ICH within first 30 d of life) . | Rate per 100 ITs (95% CI) . | |
| All | 883 (100%) | 242 (27.4%) | 27.4 (24.5-30.3) | 68 (7.7%) | 7.7 (5.9-9.5) | 24 (2.7%) | 2.7 (1.6-3.8) |
| HA | 691 (78.3) | 201 (83.1%) | 29.1 (25.7-32.5) | 57 (83.8%) | 8.2 (6.2-10.3) | ∗ | ∗ |
| HB | 192 (21.7) | 41 (16.9%) | 21.4 (15.6-27.2) | 11 (16.2%) | 5.7 (2.4-9.0) | ∗ | ∗ |
| Age of diagnosis | |||||||
| <1 mo | 625 (74.8%) | 220 (93.2%) | 35.2 (31.5-38.9) | 53 (79.1%) | 8.5 (6.3-10.7) | 22 (91.7%) | 3.5 (2.1-5.0) |
| ≥1 mo | 211 (25.2%) | 16 (6.8%) | 7.6 (4.0-11.2) | 14 (20.9%) | 6.6 (3.3-10.0) | ∗ | 0.9 (0 to 2.3) |
| Unknown | 47 (-) | 6 (-) | 1 (-) | ∗ | |||
| Severity | |||||||
| Severe | 550 (63.1%) | 172 (71.7%) | 31.3 (27.4-35.1) | 53 (77.9%) | 9.6 (7.2-12.1) | 17 (70.8%) | 3.1 (1.6-4.5) |
| Moderate/Mild | 322 (36.9%) | 68 (28.1) | 21.1 (16.7-25.6) | 15 (22.1%) | 4.7 (2.4-7.0) | 7 (29.2%) | 2.2 (0.6-3.8) |
| Moderate | 189 (21.7%) | 46 (19.2%) | 24.3 (18.2-30.5) | ||||
| Mild | 133 (15.3%) | 22 (9.2%) | 16.5 (10.2-22.9) | ||||
| Unknown | 11 (-) | 2 (-) | 4 (-) | ||||
| FH | |||||||
| No | 236 (27.6%) | 67 (28.4%) | 28.4 (22.6-34.1) | 25 (36.8%) | 10.6 (6.7-14.5) | 8 (33.3%) | 3.4 (1.1-5.7) |
| Yes | 619 (72.4%) | 169 (71.6%) | 27.3 (23.8-30.8) | 43 (63.2%) | 6.9 (4.9-8.9) | 16 (66.7%) | 2.6 (1.3-3.8) |
| Unknown | 28 (-) | 6 (-) | 0 (-) | 0 (-) | |||
| Method of delivery | |||||||
| Cesarean delivery | 226 (30.4%) | 19 (10.8%) | 8.4 (4.8-12.0) | 12 (21.4%) | 5.3 (2.4-8.2) | ∗ | ∗ |
| Vaginal delivery | 517 (69.6%) | 157 (89.2%) | 30.4 (26.4-34.3) | 44 (78.6%) | 8.5 (6.1-10.9) | 17 (77.3%) | 3.3 (1.8-4.8) |
| Unknown | 140 (-) | 66 (-) | 12 (-) | ∗ | |||
| ICH history | |||||||
| No | 810 (92.3%) | 204 (85.7%) | 25.2 (22.2-28.2) | N/A | N/A | N/A | N/A |
| Yes | 68 (7.7%) | 34 (14.3%) | 50.0 (38.1-61.9) | 68 (100.0%) | N/A | 24 (100.0%) | 35.3 (23.9-46.7) |
| Unknown | 5 (-) | 4 (-) | N/A | N/A | N/A | N/A | |
| Age of first ICH | |||||||
| <1 mo | 24 (35.3%) | 23 (67.6%) | 95.8 (87.8-100.0) | 24 (35.3%) | N/A | 24 (100.0%) | N/A |
| ≥1 mo | 44 (64.7%) | 11 (32.3%) | 25.0 (12.2-37.8) | 44 (64.7%) | N/A | N/A | N/A |
| ICH associated with trauma | |||||||
| No | 26 (52.0%) | 17 (65.4%) | 65.4 (47.1-83.7) | 26 (52.0%) | N/A | 11 (57.9%) | 42.3 (23.3-61.3) |
| Yes | 24 (48.0%) | 9 (34.6%) | 37.5 (18.1-56.9) | 24 (48.0%) | N/A | 8 (42.1%) | 33.3 (14.5-52.2) |
| Unknown | 18 (-) | 8 (-) | 18 (-) | 5 (-) | ∗ | ||
| Continuous prophylaxis when ICH occurred | |||||||
| No | 57 (87.7%) | ∗ | ∗ | 57 (87.7%) | N/A | ∗ | ∗ |
| Yes | 8 (12.3%) | ∗ | ∗ | 8 (12.3%) | N/A | ∗ | ∗ |
| Unknown | 3 (-) | 3 (-) | |||||
Categorical data are presented as n (%).
N/A, not applicable; 95% CI, confidence interval.
Known fields with N of greater than 0 but less than 5 have been suppressed to protect patient confidentiality. Additional cells may be suppressed to prevent derivation of these counts by subtraction.