Table IV.
Odds ratio for blood transfusion by important risk factors (n=239).
| Characteristics | Blood transfusion | |||
|---|---|---|---|---|
| ORa (95% CI) | p value | ORb (95% CI) | p-value | |
| Age in years | 1.03 (0.92 - 1.14) | 0.616 | - | |
| Gestational age in weeks | 0.99 (0.84 - 1.18) | 0.946 | - | |
| BMI | 1.05 (0.99 - 1.13) | 0.123 | 1.04 (0.93 - 1.15) | 0.532 |
| Estimated blood loss in ml | 1.00 (1.00 - 1.01) | < 0.001 | 1.00 (1.00 - 1.01) | 0.089 |
| Operative time in minutes | 1.07 (1.02 - 1.12) | 0.008 | 1.06 (0.99 - 1.13) | 0.084 |
| Hospital stay in days | 2.68 (1.59 - 4.52) | < 0.001 | 1.59 (0.77 - 3.29) | 0.207 |
| Parity | ||||
| 2 | Ref | Ref | ||
| 3 | 0.90 (0.28 - 2.92) | 0.862 | 0.26 (0.04 - 1.64) | 0.152 |
| 4 | 4.29 (1.43 - 12.92) | 0.009 | 0.71 (0.16 - 3.18) | 0.653 |
| No. of previous LSCS | ||||
| 2 | Ref | |||
| >2 | 1.60 (0.62 - 4.14) | 0.333 | - | |
| Type of surgery | ||||
| Elective | Ref | |||
| Emergency | 1.83 (0.63 - 5.34) | 0.266 | - | |
| Hypertension | ||||
| No | Ref | Ref | ||
| Yes | 3.06 (1.02 - 9.23) | 0.046 | 6.31 (1.45 - 27.53) | 0.014 |
| Diabetes mellitus | ||||
| No | Ref | |||
| Yes | 0.44 (0.06 - 3.47) | 0.439 | - | |
| Adhesions | ||||
| No/mild | Ref | Ref | ||
| Moderate | 1.24 (0.14 - 10.65) | 0.848 | 6.45 (0.48 - 86.38) | 0.159 |
| Dense | 5.55 (2.12 - 14.48) | < 0.001 | 13.62 (2.63 - 70.66) | 0.002 |
| Uterine Atony | ||||
| No | Ref | Ref | ||
| Yes | 15.85 (3.29 - 76.37) | 0.001 | 49.03 (4.16 - 578.30) | 0.002 |
| Placenta previa | ||||
| No | Ref | Ref | ||
| Yes | 21.60 (1.87 - 248.75) | 0.014 | 77.25 (1.72 - 3464.24) | 0.025 |
ORa: Unadjusted odds ratio, ORb: Odds ratio adjusted for BMI, estimated blood loss, operative time, hospital stay, parity, hypertension, adhesions, uterine atony and placenta previa, CI: confidence interval.