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Table 1 Demographic variables (n = 91)

From: Serum lactate dehydrogenase profile as a retrospective indicator of uterine preparedness for labor: a prospective, observational study

Maternal age (yrs) 24.9 (4.8) Range: 18-36
Gestational age at delivery (days) 276.1 (7.1) Range: 259-290
Hispanic   
 Yes 5 (5.5%)  
 No 86 (94.5%)  
Race   
 White 66 (72.5%)  
 Black 18 (19.8%)  
 Other 7 (7.7%)  
Marital status   
 Married 41 (45.1%)  
 Not married 50 (54.9%)  
Body mass index (maternal) 29.9 (4.6) Range: 18.0-41.7
Cervical dilatation at admission (cm) 3.6 (0.5) Range: 3.0-5.0
Cervical effacement at admission   
 50% – < 80% 11 (12.1%)  
 ≥ 80% 80 (87.9%)  
Mode of birth   
 Vaginal 81 (89.0%)  
 Cesarean 10 (11.0%)  
Membrane rupture type   
 Spontaneous 33 (36.3%)  
 Amniotomy within 4 hrs of admission 41 (45.0%)  
 Amniotomy at > 4 hrs after admission 17 (18.7%)  
Oxytocin augmentation   
 No 33 (36.3%)  
 Yes, within 4 hrs of admission 27 (29.7%)  
 Yes, at > 4 hrs after admission 31 (34.0%)  
Epidural use   
 No 5 (5.5%)  
 Yes 86 (94.5%)  
In-hospital labor duration (hr)* 8.9 (3.7) Range: 2.8-20.9
Weight (infant) (g) 3392.8 (460.9) Range: 2329-4722
Length (infant) (cm) 49.5 (2.2) Range: 44.0-54.5
  1. Mean (SD) for continuous variables; n (%) for categorical variables.
  2. * Includes only those delivering vaginally (n = 81).