Preliminary Exploration and Validation of a Prediction Model for Delay Onset of Lactation Stage II in Cesarean Section Parturients
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摘要:
目的 探索剖宫产产妇泌乳II期启动延迟(delayed onset of lactogenesis Ⅱ,DOL II)预测模型并验证其预测效果。 方法 采取便利抽样法选择2023年12月—2025年1月就诊于昆明市某三级甲等妇幼保健院的651例剖宫产产妇为研究对象,将其随机分为建模组(456例)和验证组(195例),通过Lasso-logistic回归构建剖宫产产妇DOL II预测模型,绘制列线图并评价其预测效果。 结果 建模组456例剖宫产产妇有92例发生DOL II,发生率为20.18%,验证组195例剖宫产产妇有32例发生DOL II,发生率为16.41%,Logistic回归分析结果示:术后日均饮水量: 1000 -1500 mL(OR:5.700)、分娩时BMI值(OR:1.155)、爱丁堡产后抑郁量表评分(OR:2.521)、匹兹堡睡眠质量指数量表评分(OR:3.457)和母乳喂养自我效能简式量表得分(OR:0.939)是剖宫产产妇DOL II的影响因素。基于影响因素构建的预测模型在建模组和验证组中的采用受试者工作特征(ROC)曲线下面积(AUC)值分别为:0.83[95%CI(0.78,0.87)]和0.76[95%CI(0.66,0.85)],Hosmer-Lemeshow 拟合优度检验分别为:X2=8.773和X2=5.002,P > 0.005,绘制的校准曲线均与理想曲线相近,校准度较好。结论 本研究构建的预测模型可为产科护理人员早期识别剖宫产产妇DOL II高危人群并制定针对性护理措施提供工具支持。 Abstract:Objective To explore and a prediction model for Delayed Onset of Lactogenesis II (DOL II) in parturients who underwent cesarean section. Methods A convenience sampling method was used to select 651 parturients who delivered by cesarean section at a Grade A tertiary maternal and child health hospital in Kunming from December 2023 to January 2025. Participants were randomly divided into a modeling group (456 cases) and a validation group (195 cases). Lasso-logistic regression was used to construct the prediction model for DOL II. A nomogram was plotted, and its predictive performance was evaluated. Results Among the 456 cesarean section parturients in the modeling group, 92 cases developed DOL II, with an incidence rate of 20.18%. Among the 195 cesarean section parturients in the validation group, 32 cases developed DOL II, with an incidence rate of 16.41%. The results of Logistic regression analysis showed that the average daily water intake after surger: 1000 -1500 mL (OR: 5.700), BMI at delivery (OR: 1.155), Edinburgh Postnatal Depression Scale score (OR: 2.521), Pittsburgh Sleep Quality Index score (OR: 3.457), and Breastfeeding Self-Efficacy Scale-Short Form score (OR: 0.939) were the influencing factors of DOL II in cesarean section parturients. The prediction model based on these factors showed good discrimination, with Area Under the Receiver Operating Characteristic (ROC) Curve (AUC) values of 0.83 [95% Confidence Interval (CI)(0.78, 0.87)] in the modeling group and 0.76[95%CI(0.66, 0.85)]in the validation group. The Hosmer-Lemeshow goodness-of-fit test yielded X2 values of 8.773 and 5.002 (both P > 0.05) for the modeling and validation groups, respectively. The calibration curves drawn were close to the ideal curve, indicating good calibration.Conclusions The prediction model constructed in this study provides instrumental support for obstetric nursing staff to early identify high-risk groups of DOL II among parturients undergoing cesarean section and develop targeted nursing interventions. -
Key words:
- Cesarean section /
- Puerperas /
- Delayed onset of lactogenesis /
- Predictive model /
- Nursing
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表 1 分类变量赋值表
Table 1. Categorical variable coding table
因素 赋值方法 结局指标 DOL II=1 ,非DOL II=0 年龄 <35=1,≥35=2 文化程度 初中或以下=1,高中或中专=2,大专或本科=3,硕士或以上=4 家庭月总收入 1000 -2999 元=1,3000 -4999 元=2,5000 -7999 元=3,8000 -9999 元=4,1万元以上=5孕期运动情况 从不运动=1,每周<3次=2,每周3-4次=3,每天运动=4 产次 初产妇=1,经产妇=2 妊娠期高血糖症 否=0,是=1 妊娠期高血压疾病 否=0,是=1 术后日均饮水量 < 1000 =1,1000 -1500 =2,1500 -2000 =3,≥2000 =4每天母乳喂养频率 <8次=1,8-12次=2,>12次=3 每次母乳喂养时间 <20 min=1,20-40 min =2,>40 min =3 血红蛋白值 <110=1,≥110=2 白蛋白值 <35=1,≥35=2 总蛋白值 <65=1,≥65=2 爱丁堡产后抑郁量表评分 <10=1,≥10=2 匹兹堡睡眠质量指数量表评分 ≤7=1,>7=2 表 2 剖宫产产妇DOLII单因素分析[n(%)/M(P25,P75)/($\bar x \pm s $)](1)
Table 2. Univariate analysis of DOLII in cesarean section parturients [n(%)/M(P25,P75)/($\bar x \pm s $)](1)
指标 非DOL II组(364) DOL II组(92) χ2/t/Z值 P值 年龄(岁) 0.344 0.558 <35 295(81.04) 77(83.70) ≥35岁 69(18.96) 15(16.30) 文化程度 1.563 0.668 初中或以下 43(11.81) 10(10.87) 高中或中专 70(19.23) 21(22.83) 大专或本科 242(66.48) 57(61.96) 硕士或以上 9(2.48) 4(4.34) 家庭月总收入(元) 2.595 0.628 1000 -2999 33(9.07) 12(13.04) 3000 -4999 106(29.12) 26(28.26) 5000 -7999 98(26.92) 19(20.65) 8000 -9999 55(15.11) 16(17.40) 1万以上 72(19.78) 19(20.65) 孕期运动情况 6.290 0.098 从不运动 38(10.44) 8(8.70) 每周<3次 123(33.79) 41(44.56) 每周3-4次 80(21.98) 23(25.00) 每天运动 123(33.79) 20(21.74) 产次 0.139 0.709 初产妇 182(50.00) 48(52.17) 经产妇 182(50.00) 44(47.83) 表 3 剖宫产产妇DOL II的多因素分析
Table 3. Multivariate analysis of DOL II in cesarean section parturients
变量 B值 S.E Wald P OR 95%CI 常量 −6.914 1.618 18.254 <0.001* 0.001 — 术后日均饮水量(以≥ 2000 mL为参考)— — 27.775 <0.001* — — < 1000 mL1.043 0.547 3.633 0.057 2.839 0.971-8.302 1000 -1500 mL1.740 0.394 19.527 <0.001* 5.700 2.634-12.335 1500 -2000 mL0.300 0.423 0.504 0.478 1.350 0.590-3.091 分娩时BMI值 0.144 0.043 11.281 0.001* 1.155 1.062-1.256 爱丁堡产后抑郁量表评分 0.925 0.317 8.507 0.004* 2.521 1.354-4.694 匹兹堡睡眠质量指数量表评分 1.240 0.286 18.782 <0.001* 3.457 1.973-6.058 母乳喂养自我效能评分 −0.063 0.014 21.711 <0.001* 0.939 0.914-0.964 *P < 0.05。 表 4 建模组和验证组预测效能对比表
Table 4. Comparison of predictive performance between the modeling group and the validation group
指标 AUC(95%CI) Cut-off 灵敏度 特异度 P 建模 0.83(0.78,0.87) 0.20 0.78 0.73 <0.001* 验证 0.76(0.66,0.85) 0.14 0.75 0.65 <0.001* *P < 0.05。 -
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