Table 3 Differences between children with and without birth records in PFK
Children with birth records in PFK database (N = 1361) | Children without birth records in PFK database (N = 898) | P | |
|---|---|---|---|
Characteristic | |||
Male | 699 (51.4) | 448 (49.9) | 0.49 |
Lives in urban area* | 1026 (75.8) | 689 (77.0) | 0.53 |
Musculoskeletal disease | 166 (12.2) | 72 (8.0) | 0.002 |
Congenital anomaly | 272 (20.0) | 84 (9.4) | <.0001 |
Person-months at end of study | 29 (17, 40) | 26 (14, 37) | 0.0002 |
Age | |||
0-6 months | 421 (30.9) | 120 (13.4) | <.0001 |
6-12 months | 268 (19.7) | 131 (14.6) | |
12-18 months | 248 (18.2) | 180 (20.0) | |
18-24 months | 164 (12.1) | 132 (14.7) | |
24-30 months | 105 (7.7) | 113 (12.6) | |
> 30 months | 155 (11.4) | 222 (24.7) | |
Enrollment continuity at end of study) | |||
Continuous enrollment ≥ 24 months | 488 (35.9) | 302 (33.6) | 0.10 |
Continuous enrollment < 24 months | 403 (29.6) | 283 (31.5) | |
Discontinuous enrollment ≥ 24 months | 351 (25.8) | 211 (23.5) | |
Discontinuous enrollment < 24 months | 119 (8.7) | 102 (11.4) | |
Enrollment breaks over the course of the study | |||
No break in enrollment | 891 (65.5) | 585 (65.1) | 0.41 |
One break | 331 (24.3) | 220 (24.5) | |
More than one break (range = 2-5 breaks) | 139 (10.2) | 93 (10.4) | |
Median family income in patient's zipcode* | |||
$20417-$42043 | 707 (52.0) | 413 (46.0) | 0.006 |
$42297-$94873 | 654 (48.0) | 485 (54.0) | |
Percent of adults with a bachelor's degree or higher in patient's zipcode* | |||
0.0-14.0% | 686 (50.4) | 405 (45.1) | 0.01 |
14.2-62.2% | 675 (49.6) | 493 (54.9) | |
Vaccination provided | 106 (7.8) | 109 (12.1) | 0.0006 |
Injury type | |||
Fracture | 315 (23.1) | 176 (19.6) | 0.046 |
Dislocation | 34 (2.5) | 32 (3.6) | 0.14 |
Burn | 70 (5.1) | 47 (5.2) | 0.92 |
Retinal hemorrhage | 41 (3.0) | 23 (2.6) | 0.53 |
Intracranial | 87 (6.4) | 41 (4.6) | 0.07 |
Abdominal thoracic | 21 (1.5) | 6 (0.7) | 0.06 |
Open wound | 104 (7.6) | 75 (8.4) | 0.54 |
Blood vessel | 5 (0.4) | 6 (0.7) | 0.31 |
Superficial Injury | 114 (8.4) | 64 (7.1) | 0.28 |
Contusions | 269 (19.8) | 163 (18.2) | 0.34 |
Crush | 3 (0.2) | 2 (0.2) | 1 |
Spinal cord | 7 (0.5) | 6 (0.7) | 0.78 |
Location of injury | |||
Head/neck | 275 (20.2) | 136 (15.1) | 0.002 |
Face | 64 (4.7) | 32 (3.6) | 0.19 |
Chest | 64 (4.7) | 30 (3.3) | 0.11 |
Abdomen and pelvic contents | 49 (3.6) | 24 (2.7) | 0.22 |
Extremities or pelvic girdle | 337 (24.8) | 231 (25.7) | 0.61 |
External | 548 (40.3) | 347 (38.6) | 0.44 |
Mechanism of injury | |||
Cut/pierce | 6 (0.4) | 5 (0.6) | 0.7 |
Drowning/submersion | 2 (0.2) | 1 (0.1) | 1 |
Fall | 223 (16.4) | 138 (15.4) | 0.52 |
Fire/Burn | 47 (3.5) | 28 (3.1) | 0.66 |
Natural/environmental | 12 (0.9) | 4 (0.5) | 0.23 |
Overexertion | 1 (0.1) | 0 (0) | 1 |
Poisoning | 17 (1.3) | 7 (0.8) | 0.29 |
Struck by/against | 63 (4.6) | 32 (3.6) | 0.22 |
Suffocation | 2 (0.2) | 1 (0.1) | 1 |
Number of injuries | |||
0 | 473 (34.8) | 335 (37.3) | 0.048 |
1 | 297 (21.8) | 217 (24.2) | |
2 | 225 (16.5) | 143 (15.9) | |
3 | 94 (6.9) | 69 (7.7) | |
4 | 75 (5.5) | 42 (4.7) | |
≥5 | 197 (14.5) | 92 (10.2) | |
Injury Severity (TMPM-ICD9 probability of death)** | 0.031 (0.011, 0.095) | 0.021 (0.009, 0.082) | <.0001 |