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Table 1 The demographic data, uterine content thickness and Doppler assessment in all groups and in each group (I, II and III) of the included patients

From: Uterine artery Doppler in the management of early pregnancy loss: a prospective, longitudinal study

   All n(%) 315(100) p-value1 Group I n(%) 142(45) p-value1 Group II n(%) 141(45) p-value1 Group III n(%) 32(10) p-value1
Age (in years) 20-24 36(12) <0.001 18(13) <0.001 14(10) <0.001 4(12) 0.030
25-34 159(50) 67(47) 76(54) 16(50)
35-46 120(38) 57(40) 51(36) 12(38)
Education level (in years) ≤9 115(37) <0.001 55(39) <0.001 48(34) <0.001 12(38) 0.197
10-12 146(46) 60(42) 72(51) 14(44)
>12 54(17) 27(19) 21(15) 6(19)
Parity 0 171(54) 0.128 64(45) 0.240 49(49) 0.842 25(78) 0.001
≥1 144(46) 78(55) 51(51) 7(22)
Previous spontaneous first trimester miscarriage (≤12 weeks) 1 277(88) <0.001 125(88) <0.001 124(88) <0.001 28(88) <0.001
>1 38(12) 17(12) 17(12) 4(12)
Body Mass Index (Kg/m2) 16-24 142(45) <0.001 72(51) <0.001 53(38) 0.001 17(53) 0.001
25-29 134(43) 58(41) 62(44) 14(44)
30-44 39(12) 12(8) 26(18) 1(3)
Smoking No 243(77) <0.001 103(39) <0.001 115(82) <0.001 25(78) 0.001
Yes 72(23) 73(27) 26(18) 7(22)
GA at early pregnancy loss diagnosis [weeks (SD)]   8.0(1.3)   7.6(1.0)   8.2(1.3)   9.1(1.3)  
Uterine arteries Doppler assessment [days (SD)]   18.2(2.8)   18.0(2.4)   18.3(3.2)   18.9(2.6)  
Intra-uterine content thickness [mm (SD)]   11.8(5.8)   6.1(2.5)   15.8(2.3)   19.6(2.3)  
Uterine content thickness at 2nd week follow-up visit <12 mm 148(0.53) 0.328 142(100)   0   0  
≥12 mm 167(0.47) 0 141(100) 32(100)
Uterine artery Doppler - Bilateral notching No 3(1) <0.001 0 <0.001 1(1) <0.001 2(6) <0.001
Yes 312(99) 142(100) 140(99) 30(94)
Decision for D&C at 8th week follow-up visit No 283(90) <0.001 142(100)   141(100) 0
Yes 32(10) 0 0 32(100)
  1. Legend: GA-gestational age; D&C - Dilation and Curettage; 1Chi-square test or Fisher’s test, as adequate; Statistical analysis (p) was obtained to evaluate the differences within each demographic and clinical characteristics.