Preoperative moderate thrombocytopenia is not associated with increased blood loss for low-risk cesarean section: a retrospective cohort study

Table 1 Baseline Characteristics

	Thrombocytopenic Group (n = 155)	Control Group (n = 310)	Standardized difference	p value
Age (yrs)	31.5 ± 4.5	31.5 ± 4.3	0.01	0.905
BMI (kg/m²)	26.2 ± 3.0	27.1 ± 2.8	0.34	0.001^*
ASA			0.12	0.271
II	134 (86.5%)	280 (90.3%)
III	21 (13.5%)	30 (9.7%)
Gestational weeks	37.8 ± 1.4	38.1 ± 1.3	0.24	0.018^*
Birth weight (g)	3024.3 ± 468.3	3059.6 ± 452.1	0.08	0.438
Previous uterine scar			0.01	1.000
Yes	28(18.1%)	55 (17.7%)
No	127(81.9%)	255 (82.3%)
Neonatal macrosomia			0.06	0.716
Yes	7 (4.5%)	18 (5.8%)
No	148 (95.5%)	292 (94.2%)
Multiple pregnancies			0.03	0.938
Yes	8 (5.2%)	14 (4.5%)
No	147 (94.8%)	296 (95.5%)
Anesthesia method			0.63	<0.001*
NA	120 (77.4%)	302 (97.4%)
GA	35 (22.6%)	8 (2.6%)
Operation timing			0.00	1.000
Elective	86 (55.5%)	172 (55.5%)
Emergency	69 (44.5%)	138 (44.5%)
Operation duration (min)	60.7 ± 16.1	57.9 ± 14.3	0.07	0.474
Preoperative PLT (×10⁹/L)	71.9 ± 13.0	203.6 ± 41.5	4.29	<0.001*

Abbreviations: BMI body mass index, ASA American Society of Anesthesiologists classification of physical status, NA neuraxial anesthesia, GA general anesthesia
Values are expressed as mean ± SD or number (percentage) of patients. Patients’ baseline characteristics were compared between groups using the standardized difference and p value, where a standardized difference smaller than 0.2 and p greater than 0.05 was considered as acceptable deviation between groups. The two groups were balanced in age, operation timing, ASA, the presence of underlying risk factors and operation duration. On the contrary, they were not balanced in BMI, gestational weeks and anesthesia method

ISSN: 1471-2393