From: A hierarchical procedure to select intrauterine and extrauterine factors for methodological validation of preterm birth risk estimation
Cluster
Min GW
1st Qu. GW
Median GW
Mean GW
Sd GW
3rd Qu. GW
Max GW
1
38.00
40.00
39.93
1.03
40.45
41.00
2
32.20
37.75
38.65
37.68
2.31
38.92
39.00
3
29.00
35.00
36.40
36.31
3.79
38.60
40.70