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表1 疑似巨大儿产妇会阴侧切的单因素分析
Table 1 Univariate analysis of episiotomy in women with suspected macrosomia [n(%)]
Variable Episiotomy group(n=40) Natural laceration group(n=109) χ 2 P
Age 1.799 0.180
<35 years 04(10.0) 21(19.3)
≥35 years 36(90.0) 88(80.7)
Way of conception 0.006 0.939
Natural conception 39(97.5) 13(11.9)
IVF⁃ET 1(2.5) 96(88.1)
Number of pregnancies
2.684 0.101
≥3 4(10.0) 26(23.9)
<3 36(90.0) 83(76.1)
Number of deliveries
16.063 <0.001
≥1 20(50.0) 90(82.6)
0 20(50.0) 19(17.4)
BMI
0.436 0.509
<30 kg/m 2 14(35.0) 32(29.4)
≥30 kg/m 2 26(65.0) 77(70.6)
Number of years of work as a midwife
5.343 0.021
<5 years 32(80.0) 65(59.6)
≥5 years 08(20.0) 44(40.4)
IVF⁃ET:in vitro fertilization⁃embryo transfer.
表2 两组产妇分娩相关指标比较
Table 2 Comparison of maternal delivery⁃related indicators between the two groups
Episiotomy group Natural laceration group
Indicator t/χ 2 P
(n=40) (n=109)
Estimated gestational age by ultrasound[weeks,M(P25,P75)] 39.6(39.0,40.3) 39.9(39.1,40.3) -0.395 0.693
Estimated fetal weight by ultrasound(g,x ± s) 3 925.48 ± 68.09 3 931.11 ± 67.89 0.445 0.657
First stage of labor(min,x ± s) 00718 ± 313 00 773 ± 286 1.014 0.311
Second stage of labor[n(%)] 27.084 <0.001
≥47 min 5(12.5)00 66(60.6)000
<47 min 35(87.5)000 43(39.4)000
Third stage of labor(min,x ± s) 009.56 ± 4.24 00 8.46 ± 5.78 1.265 0.209
Painless delivery[n(%)] 9.868 0.002
Yes 37(92.5)000 73(67.0)000
No 3(7.5)000 36(33.0)000
Way of rupture[n(%)] 1.303 0.254
Natural rupture 30(75.0)000 71(65.1)000
Amniotomy 10(25.0)000 38(34.9)000
Meconium⁃stained amniotic fluid[n(%)] 4.501 0.034
Clear and Ⅰ 29(72.5)000 95(87.2)000
Ⅱ and Ⅲ 11(27.5)000 14(12.8)000
和无痛分娩是影响会阴侧切的次要因素(P > 0.05, 归情况,发现会阴侧切组中新生儿出生后 1 min 和
表3)。 5 min Apgar 评分明显低于自然裂伤组(P=0.001,P=
2.4 两组间母儿转归相关因素比较 0.019),胎儿宫内窘迫发生率明显高于会阴裂伤组
进一步分析会阴侧切组和会阴裂伤组间母儿转 (45.0% vs. 6.4%,P=0.001),且产后出血率显著低于

