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