Table 1.

Summary of electrohysterographic recordings (EHG) features and obstetric data inputs.

EHG Temporal Parameters	EHG Spectral Parameters	EHG Nonlinear Parameters	Obstetric Data
Peak-to-peak amplitude	DF1 DF2 H/L ratio Deciles [D1–D9] SMR	Binary Lempel-Ziv Multistate Lempel-Ziv (n = 6) Sample entropy Spectral entropy Fuzzy entropy Time reversibility SD1 SD2 SD1/SD2	Cervical length Gestational age at moment of recording Maternal age Gestations Parity Abortions