Variable GA < 26 weeks GA < 26 weeks GA < 28 weeks GA < 28 weeks GA < 32 weeks GA < 32 weeks GA < 32 weeks GA < 32 weeks GA < 34 weeks GA < 34 weeks GA < 34 weeks GA < 34 weeks
Univariate model Univariate model Univariate model Univariate model Univariate model Univariate model Multivariate model Multivariate model Univariate model Univariate model Multivariate model Multivariate model
RR (95% CI) P RR (95% CI) P RR (95% CI) P RR (95% CI) P RR (95% CI) P RR (95% CI) P
LIT 0.18 (0.04 - 0.8) 0.02 0.37 (0.19 - 0.72) 0.004 0.51 (0.39 - 0.67) <0.001 0.52 (0.38 - 0.72) <0.001 0.69 (0.58 - 0.81) <0.001 0.68 (0.55 - 0.84) <0.001
Parity
0 Ref. Ref. Ref. Ref.
1 0.8 (0.23 - 2.76) 0.72 1.28 (0.64 - 2.55) 0.49 1.08 (0.82 - 1.42) 0.59 1.1 (0.93 - 1.3) 0.29
≥ 2 1.52 (0.5 - 4.58) 0.46 1.74 (0.88 - 3.41) 0.11 1.3 (1 - 1.7) 0.05 1.03 (0.85 - 1.24) 0.78
Race
White Ref. Ref. Ref. Ref.
Black  - - 0.37 (0.09 - 1.52) 0.17 0.98 (0.68 - 1.43) 0.93 1.18 (0.96 - 1.45) 0.12
Hispanic 1.92 (0.72 - 5.12) 0.19 1.44 (0.79 - 2.63) 0.24 1.13 (0.86 - 1.49) 0.39 1.14 (0.95 - 1.36) 0.15
Other  - - 0.24 (0.03 - 1.7) 0.15 0.93 (0.6 - 1.43) 0.73 1.01 (0.76 - 1.33) 0.97
BMI
Normal Ref. Ref. Ref. Ref.
Overweight 1.06 (0.35 - 3.21) 0.92 0.56 (0.27 - 1.16) 0.12 0.92 (0.69 - 1.22) 0.57 1.06 (0.88 - 1.28) 0.52
Obese 0.68 (0.2 - 2.34) 0.54 0.85 (0.46 - 1.59) 0.62 1.05 (0.81 - 1.36) 0.72 1.09 (0.91 - 1.3) 0.36
Recipient MVP
Normal Ref. Ref. Ref. Ref.
Polyhydramnios 0.76 (0.1 - 6.12) 0.79 1.08 (0.26 - 4.45) 0.92 0.99 (0.62 - 1.57) 0.95 0.94 (0.7 - 1.25) 0.66
Severe polyhydramnios 1.86 (0.24 - 14.15) 0.55 2.69 (0.67 - 10.73) 0.16 1.21 (0.75 - 1.93) 0.43 1.11 (0.83 - 1.49) 0.48
Trocar outer shea
< 3.1 Ref. Ref. Ref. Ref. Ref. Ref.
3.1 – 3.33 0.48 (0.12 - 1.89) 0.29 1.03 (0.52 - 2.05) 0.93 1.07 (0.81 - 1.42) 0.63 0.87 (0.66 - 1.15) 0.34 1.18 (0.98 - 1.42) 0.08 0.99 (0.83 - 1.2) 0.95
3.33 – 3.8 0.44 (0.05 - 3.56) 0.44 0.38 (0.09 - 1.6) 0.19 0.6 (0.35 - 1.02) 0.06 0.8 (0.45 - 1.42) 0.45 0.9 (0.67 - 1.22) 0.51 1.05 (0.76 - 1.45) 0.75
≥ 3.8 1.45 (0.48 - 4.36) 0.51 1.45 (0.73 - 2.89) 0.29 1.37 (1.03 - 1.81) 0.03 0.96 (0.72 - 1.28) 0.78 1.24 (1.02 - 1.51) 0.03 0.95 (0.78 - 1.17) 0.66
Anastomoses
< 9 Ref. Ref. Ref. Ref.
9 – 12 1.19 (0.33 - 4.28) 0.79 1.23 (0.57 - 2.68) 0.59 1.04 (0.76 - 1.43) 0.79 1.01 (0.83 - 1.23) 0.93
12 – 15 0.75 (0.17 - 3.26) 0.7 1.1 (0.49 - 2.46) 0.82 1.02 (0.74 - 1.41) 0.88 0.94 (0.76 - 1.15) 0.54
≥ 15 0.8 (0.21 - 3.12) 0.75 0.88 (0.39 - 1.99) 0.76 0.88 (0.64 - 1.22) 0.44 0.84 (0.68 - 1.04) 0.11
Septostomy 1.16 (0.34 - 3.96) 0.81 1.26 (0.64 - 2.49) 0.51 1.35 (1.05 - 1.74) 0.02 1.08 (0.84 - 1.39) 0.55 1.26 (1.07 - 1.47) 0.004 1.12 (0.95 - 1.31) 0.17
RR: relative risk; CI: confidence interval EXPLAIN OTHER ABBREVIATIONS RR: relative risk; CI: confidence interval EXPLAIN OTHER ABBREVIATIONS RR: relative risk; CI: confidence interval EXPLAIN OTHER ABBREVIATIONS RR: relative risk; CI: confidence interval EXPLAIN OTHER ABBREVIATIONS RR: relative risk; CI: confidence interval EXPLAIN OTHER ABBREVIATIONS RR: relative risk; CI: confidence interval EXPLAIN OTHER ABBREVIATIONS RR: relative risk; CI: confidence interval EXPLAIN OTHER ABBREVIATIONS RR: relative risk; CI: confidence interval EXPLAIN OTHER ABBREVIATIONS RR: relative risk; CI: confidence interval EXPLAIN OTHER ABBREVIATIONS RR: relative risk; CI: confidence interval EXPLAIN OTHER ABBREVIATIONS RR: relative risk; CI: confidence interval EXPLAIN OTHER ABBREVIATIONS RR: relative risk; CI: confidence interval EXPLAIN OTHER ABBREVIATIONS RR: relative risk; CI: confidence interval EXPLAIN OTHER ABBREVIATIONS