Table 1.
Characteristics of school-aged children born late preterm or full term*
| No. (%) of subjects |
||||
|---|---|---|---|---|
| LP-ICU (n = 126) | LP-non-ICU (n = 127) | FT-ICU (n = 131) | P | |
| Gender |
||||
| male |
71 (56.3) |
73 (57.5) |
78 (59.5) |
0.871 |
| female |
55 (43.7) |
54 (42.5) |
53 (40.5) |
|
| Child’s age when tested (years) |
||||
| ≤9 |
46 (36.5) |
47 (37.0) |
47 (35.9) |
0.982 |
| >9-12 |
80 (63.5) |
80 (63.0) |
84 (64.1) |
|
| Gestational age (weeks) |
||||
| 340/7-346/7 |
36 (28.6) |
18 (14.2) |
0 |
<0.001 |
| 350/7-366/7 |
90 (71.4) |
109 (85.8) |
0 |
|
| ≥37 |
0 |
0 |
131 (100) |
|
| Complicated pregnancy |
||||
| no |
45 (35.7) |
61 (48.0) |
83 (63.4) |
<0.001 |
| yes |
81 (64.3) |
66 (52.0) |
48 (36.6) |
|
| Mode of delivery |
||||
| vaginal |
78 (61.9) |
103 (81.1) |
98 (75.4) |
0.002 |
| Cesarean section |
48 (38.1) |
24 (18.9) |
32 (24.6) |
|
| Birth weight (g; median, IQR) |
2600 (613) |
2600 (500) |
3700 (650) |
<0.001 |
| Apgar score 5 minutes (median, IQR) |
8 (2) |
9 (2) |
9 (3) |
<0.001 |
| Primary diagnosis at birth |
||||
| healthy |
0 |
112 (88.2) |
0 |
0.509† |
| hypoxia |
45 (35.7) |
0 |
36 (27.5) |
|
| infection |
34 (27.0) |
0 |
36 (27.5) |
|
| RDS |
24 (19.0) |
0 |
30 (22.9) |
|
| other |
23 (18.3) |
15 (11.8) |
29 (22.1) |
|
| Mechanical ventilation |
||||
| no |
89 (70.6) |
127 (100) |
114 (87.0) |
0.002† |
| yes |
37 (29.4) |
na |
17 (13.0) |
|
| Duration of ICU treatment (days; median, IQR) |
8.0 (4.0) |
na |
5.0 (3.0) |
<0.001† |
| Family socio-economic status |
||||
| poor |
9 (7.2) |
14 (11.1) |
11 (8.4) |
0.424 |
| average |
88 (69.8) |
85 (67.5) |
81 (61.8) |
|
| good |
29 (23.0) |
27 (21.4) |
39 (29.8) |
|
| Mothers’ age at delivery (years) |
||||
| <25 |
27 (21.4) |
31 (24.4) |
22 (16.8) |
0.315 |
| 25-29 |
40 (31.8) |
40 (31.5) |
55 (42.0) |
|
| 30-34 |
35 (27.8) |
40 (31.5) |
37 (28.2) |
|
| ≥35 |
24 (19.0) |
16 (12.6) |
17 (13.0) |
|
| Order of birth |
||||
| firstborn |
76 (60.3) |
68 (53.5) |
71 (54.2) |
0.050 |
| second-born |
26 (20.6) |
45 (35.4) |
34 (26.0) |
|
| between third- and fifth-born |
24 (19.0) |
14 (11.0) |
26 (19.8) |
|
| Mothers’ educational level |
||||
| primary or high school |
86 (68.3) |
86 (67.7) |
94 (71.8) |
0.746 |
| university | 40 (31.7) | 41 (32.3) | 37 (28.2) | |
*Abbreviations: LP-ICU – late preterm infant treated in the intensive care unit, LP-non-ICU – late preterm infant not treated in ICU, FT-ICU – full-term infant treated in ICU, IQR – interquartile range, RDS – respiratory distress syndrome, na – not applicable.
†LP-ICU vs FT-ICU group.