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Table 3 Adjusted associations of maternal TTR concentration in pregnancy with intrapartum complications

From: Associations of maternal serum transthyretin concentration with pregnancy and birth outcomes

Ā 

TTR (mg/L)

As continuous

Quartiles

Q1: ≤210

Q2:210 < X ≤ 234

Q3:234 < X ≤ 257

Q4:>257

Postpartum hemorrhage

n (%)

270 (3.1)

62 (3.7)

54 (3.2)

44 (2.7)

47 (2.9)

Ā 

OR (95%CI)

0.996 (0.993,1.000)

1.00

0.83 (0.57,1.21)

0.70 (0.47,1.03)

0.76 (0.52,1.13)

Ā 

P

0.065

Ā 

0.341

0.072

0.175

IAI

n (%)

187 (2.8)

63 (3.7)

45 (2.7)

47 (2.9)

37 (2.3)

Ā 

OR (95%CI)

0.998 (0.994,1.001)

1.00

0.90 (0.60,1.35)

1.03 (0.69,1.54)

0.78 (0.51,1.20)

Ā 

P

0.194

Ā 

0.620

0.889

0.265

PROM

n (%)

1090 (16.6)

286 (16.9)

274 (16.4)

285 (17.6)

258 (16.1)

Ā 

OR (95%CI)

1.001 (0.999,1.003)

1.00

1.06 (0.88,1.28)

1.18 (0.98,1.42)

1.05 (0.87,1.27)

Ā 

P

0.314

Ā 

0.538

0.086

0.611

Placenta previa

n (%)

109 (1.7)

34 (2.0)

26 (1.6)

20 (1.2)

30 (1.9)

Ā 

OR (95%CI)

1.001 (0.997,1.006)

1.00

1.05 (0.61,1.82)

0.90 (0.50,1.61)

1.38 (0.81,2.35)

Ā 

P

0.566

Ā 

0.852

0.715

0.236

  1. CI, confidence interval; OR, odds ratio; TTR, transthyretin; IAI, Intraamniotic infection; PROM, premature rupture of membranes.
  2. Models were adjusted for child’s sex, maternal age, pre-pregnancy BMI, marital status, education level, parity, gestational age, hepatitis virus carrying status, chronic hypertension and pregestational diabetes