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. Author manuscript; available in PMC: 2019 Feb 1.
Published in final edited form as: J Matern Fetal Neonatal Med. 2017 Oct 11;32(4):527–541. doi: 10.1080/14767058.2017.1384460

Table 2.

Hazard ratios of various variables related to amniocentesis to delivery interval

Characteristics Unadjusted hazard ratio
(95% CI)		 Adjusted hazard ratio
(95% CI)*
Intra-amniotic inflammation and/or MIAC
Intra-amniotic inflammation (−)/ MIAC (−) (group 1) Reference Reference
Intra-amniotic inflammation (+)/ MIAC (−) (group 2) 2.78 (1.67–4.62) 4.14 (2.36–7.26)
Intra-amniotic inflammation (+)/ MIAC (+) (group 3) 2.69 (1.25–5.80) 4.48 (1.98–10.2)
Cervical dilatation 1.61 (0.97–2.69) 1.71 (1.01–2.89)
Gestational age at amniocentesis 1.09 (1.01–1.18) 1.17 (1.08–1.26)

CI, confidence interval; MIAC, microbial invasion of amniotic cavity.

*

Adjusted for gestational age at amniocentesis, intra-amniotic inflammation, MIAC, and cervical dilatation (Cox proportional hazard model)