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. 2021 May 26;22(2):801. doi: 10.3892/etm.2021.10233

Table III.

Cox regression analysis assignment table.

Factors Variable Assignment
Age X1 No=0, yes=1
Allergic reaction X2 No=0, yes=1
Smoking history X3 No=0, yes=1
Drinking history X4 No=0, yes=1
Diet X5 No=0, yes=1
History of genital surgery X6 No=0, yes=1
History of salpingotomy X7 No=0, yes=1
History of pelvic infection X8 No=0, yes=1
History of lower abdominal surgery X9 No=0, yes=1
History of ectopic pregnancy X10 No=0, yes=1
PAPP-A X11 No=0, yes=1

PAPP-A, pregnancy-associated plasma protein-A.