TABLE 1.

Patient, AF, and outcome characteristics

VariableAll patients (n = 48)Patients with:P value
Intact membranes (n = 27)PPROM (n = 21)
Clinical characteristics at amniocentesis
    Mean age yr (95% CI)27.5 (25.6-29.3)25.5 (23.3-27.8)30.0 (27.2-32.8)0.018a
    Mean gestational age, wk (95% CI)27.0 (25.7-28.3)26.0 (24.2-27.7)28.4 (26.7-30.2)0.057a
    Median gravidity (range)2.5 (1-11)2 (1-9)4 (1-11)0.023b
    Median parity (range)1 (0-8)0 (0-8)2 (0-7)0.013b
AF laboratory analyses
    Mean glucose concn, g/dl (95% CI)23.8 (19.6-28.0)27.7 (22.8-32.6)19.0 (12.2-25.8)0.046a
    No. with glucose concn of <15 g/dl (%)15 (31%)4 (15)11 (52)0.129c
    Mean WBC count, cells/mm3 (95% CI)15.0 (0-33,500)11.0 (0-1,370)36.0 (0-33,500)0.220b
    No. with WBC count of >50 cells/mm3 (%)15 (31)5 (19)10 (48)0.058c
    No. with WBC count of >100 cells/mm3 (%)12 (25)3 (11)9 (43)0.018c
    No. with positive culture result (%)12 (25)3 (11)9 (43)0.185c
    No. with positive Gram stain (%)7 (15)3 (11)4 (19)1.000c
Delivery and outcome measurements
    Mean gestational age at delivery, wk (95% CI)30.7 (28.7-32.6)32.4 (29.5-35.4)28.4 (26.5-30.2)0.043a
    Median latency, days (range)5.5 (0-151)23.0 (1-151)1.0 (0-13)<0.001b
  • a Student t test.

  • b Mann-Whitney test.

  • c Fisher's exact test.