Table 2 Odds ratio of variables for massive hemorrhage in univariable and multivariable logistic regression models. Multivariable analysis was evaluated in four models.

From: Predictive factors for massive hemorrhage in women with retained products of conception: a prospective study

Variable

OR [95% CI] (P value)

in univariate analysis

Adjusted OR [95% CI] (P value) in multivariable analysis

Main model

Model 1

Model 2

Model 3

PDCS

34.89 [4.13–4,573.57]

(0.000)

22.39 [2.25–3,087.92]

(0.004)

20.43[2.25–2,710.32]

(0.004)

29.95 [2.79–4,171.13]

(0.002)

22.40 [2.49–2,966.14]

(0.002)

ART

7.25 [2.02–32.59]

(0.002)

5.72 [1.28–33.29]

(0.022)

4.17 [0.94–21.69]

(0.06)

4.83 [1.15–24.34]

(0.031)

7.40 [1.56–51.58]

(0.01)

Hb

5.68 [1.66–22.61]

(0.005)

4.24 [0.97–22.99]

(0.056)

βhCG

1.68 [0.53–5.51]

(0.014)

1.86 [0.41–8.35]

(0.414)

Diameter

4.45 [1.35–16.36]

(0.38)

0.76 [0.17–3.47]

(0.715)

Trimester

1.58 [0.83–3.09]

(0.16)

2.35 [0.98–6.98]

(0.057)

  1. OR, odds ratio; CI, confidence interval; PDCS, power Doppler color scoring; ART, assisted reproductive technology; Hb, serum hemoglobin; βhCG, serum β-human chorionic gonadotropin. Logistic regression model with Firth’s correction method. P value of < 0.05 were considered statistically significant.