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. 2021 Oct 13;7(4):65. doi: 10.3390/ijns7040065

Table 3.

Comparison of prevalences <32 and ≥32 weeks of gestation.

Study Group
<32 Weeks
of Gestation 1 		Comparison Group
≥32 Weeks
of Gestation 2
n Per 10,000 births n Per 10,000 births
Permanent 14 6.0 375 2.3
Transient 23 9.9 40 0.25
Inconclusive 9 3.9 7 0.04
Unknown 5 2.2 22 0.14
Total 51 22.0 444 2.8

1 This analysis: birth years 1999–2017; 23,171 births <32 weeks of gestation. 2 Bavarian NBS follow-up study: birth years 1999–2013; 1,615,592 births ≥32 weeks of gestation.