|
Risk factors of deep perineal tear |
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| Risk factors |
Univariate analysis RR (95% CI) |
Multivariate analysis RR (95% CI) |
|
|
||
| Midline episiotomy |
2.12 (1.52, 2.96)* |
1.94 (1.25, 2.99)* |
| Maternal age > 35 yrs., < 20 yrs. |
0.81 (0.49, 1.33) |
0.94 (0.56, 1.59) |
| Primiparity |
3.47 (2.27, 5.31)* |
3.56 (2.23, 5.69)* |
| Gestational age > 41 wks. |
0 (α, α) |
8.39 (0, α) |
| Maternal height ≤ 145 cm. |
2.60 (1.19, 5.67)* |
4.22 (2.01, 8.44)* |
| Maternal body mass index > 25 |
0.94 (0.65, 1.36) |
1.01 (0.96, 1.06) |
| Baby birth weight > 3500 gm. |
1.51 (0.99, 2.27) |
2.22 (1.46, 3.38)* |
| Experienced Physician |
||
| 1. intern |
2.50 (0, α) |
9.45 (0, α) |
| 2. resident |
0.48 (0.34, 0.67) |
0.69 (0.44, 1.08) |
| 3. staff |
1 |
1 |
| Operative vaginal delivery |
||
| 1. vacuum extraction |
1.92 (1.17, 3.15)* |
1.12 (0.62, 2.00) |
| 2. forceps extraction |
4.04 (2.70, 6.04)* |
2.82 (1.89, 4.19)* |
| 3. normal vg. Delivery |
1 |
1 |
| Duration of second stage > 60 min |
2.30 (1.17, 4.54)* |
1.69 (0.81, 3.54) |
|
*statistically significant | ||
Sooklim et al. Reproductive Health 2007 4:10 doi:10.1186/1742-4755-4-10 |
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