Table 5.
Comparison of mean weight gain velocity between the PreM Growth Study cohorts and fetal-infant estimate
| Cohort | mean | SD | n | Fetal infant estimate | Difference | P value |
|---|---|---|---|---|---|---|
| Birth to 2 weeks postnatal age |
|
|
|
|||
| 23-25 weeks |
3.8 |
6.6 |
193 |
18.2 |
−14.4 |
<0.0001 |
| 26-28 weeks |
2.5 |
5.0 |
429 |
18.0 |
−15.5 |
<0.0001 |
| 29-31 weeks |
6.8 |
4.8 |
160 |
17.3 |
−10.5 |
<0.0001 |
| Gain 2 weeks after birth to 37 weeks |
|
|
|
|||
| 23-25 weeks |
13.3 |
1.7 |
168 |
16.1 |
−2.8 |
<0.0001 |
| 26-28 weeks |
14.3 |
2.2 |
381 |
15.4 |
−1.1 |
<0.0001 |
| 29-31 weeks |
14.9 |
2.8 |
144 |
13.5 |
1.4 |
0.46 |
| Gain 37 to 40* weeks (40 weeks based on the FIGR-2013) |
|
|
|
|||
| 23-25 weeks |
11.5 |
3.4 |
140 |
7.5 |
4.0 |
<0.0001 |
| 26-28 weeks |
11.4 |
3.1 |
314 |
7.5 |
3.9 |
<0.0001 |
| 29-31 weeks |
12.3 |
3.8 |
124 |
7.5 |
4.8 |
<0.0001 |
| 40 to 50 weeks (40 weeks based on the FIGR-2013) | ||||||
| 23-25 weeks |
6.9 |
1.7 |
101 |
6.5 |
0.4 |
0.016 |
| 26-28 weeks |
7.0 |
1.6 |
256 |
6.5 |
0.5 |
<0.0001 |
| 29-31 weeks |
6.7 |
1.3 |
100 |
6.5 |
0.2 |
0.09 |
| 40 to 50 weeks (40 weeks based on the WHO Growth Standard) | ||||||
| 23-25 weeks |
6.9 |
1.5 |
101 |
7.4 |
−0.5 |
<0.0001 |
| 26-28 weeks |
7.0 |
1.4 |
256 |
7.4 |
−0.4 |
<0.0001 |
| 29-31 weeks | 6.7 | 1.2 | 100 | 7.4 | −0.7 | <0.0001 |