I read the article by Uccella et al. The authors reported that low plasma pregnancy-associated plasma protein-A (PAPP-A) levels predicted several poor pregnancy outcomes. There seems to be a conflict between the data in the table and that in the text. The table shows a probability value for preterm delivery of less than 37 weeks as 0.22 (not significant), but the last paragraph in the Results section states that preterm delay (<37 and <34 weeks) was higher in the women with low PAPP-A levels. The same statement is also made in the Comment section (paragraph 2 on page 168).

This discrepancy should be corrected.