Obstetric risk factors. Valencia hospitals, years 1994–95
| Condition | Number | % of total | % caesareans |
| Antecedent of caesarean | 1 522 | 4.1 | 72.7 |
| Breech presentation | 1 090 | 3.0 | 70.3 |
| Dystocia | 2 985 | 8.1 | 85.9 |
| Fetal distress | 3 086 | 8.4 | 35.2 |
| Other or maternal factors2-150(all) | 1 639 | 4.4 | 41.1 |
| Antepartum haemorrhaging,abruptio and others (641) | 190 | 0.5 | 85.6 |
| Delayed intrauterine growth (656.5) | 96 | 0.3 | 46.9 |
| Macrosomatia (656.6) | 54 | 0.1 | 37.0 |
| Diabetes mellitus (648.0, 648.8) | 191 | 0.5 | 25.6 |
| Hypertension disease (642) | 364 | 1.0 | 47.0 |
| Oligohydramnios (658.0) | 74 | 0.2 | 28.7 |
| Abnormal uterine neck (654.6) | 138 | 0.4 | 99.3 |
| Rh iso-immunisation (656.1) | 481 | 1.3 | 8.9 |
| Abnormal rests after birth (diagnosis 650) | 7 472 | 20.3 | 14.4 |
| Multiple birth (g) | 521 | 1.4 | 52.2 |
| Weight at birth | |||
| less than 2500 | 5 925 | 16.1 | 22.6 |
| between 2500 and 4000 | 28 143 | 76.4 | 15.3 |
| greater than 4000 | 1 580 | 4.3 | 26.6 |
| not provided or invalid | 1 171 | 3.2 | 34.7 |
| Maternal age (y) | |||
| less than 25 | 5 372 | 14.6 | 14.9 |
| under 25 and 34 | 26 246 | 71.3 | 17.1 |
| more than 34 | 5 027 | 13.6 | 23.1 |
| not provided or invalid | 174 | 0.5 | 16.1 |
| Charlson Comorbidity Index854 | |||
| 0 (no chronic comorbidity) | 36 566 | 99.3 | 17.4 |
| 1 or more | 253 | 0.7 | 41.5 |
| Circumstances of admission | |||
| Emergency | 36 330 | 98.7 | 17.5 |
| Programmed | 487 | 1.3 | 27.3 |
| Not provided or invalid | 2 | 0.0 | 100.0 |
| Length of prepartal stay (days) | |||
| 0 | 21 465 | 58.3 | 12.7 |
| 1 | 8 937 | 24.3 | 18.5 |
| 2 | 1 757 | 4.8 | 26.5 |
| 3 | 1 095 | 3.0 | 28.4 |
| 4 or more | 2 951 | 8.0 | 42.2 |
| not provided or invalid | 614 | 1.7 | 12.4 |
| Day of the week | |||
| Weekend | 9 428 | 25.6 | 14.7 |
| Monday–Friday | 26 878 | 73.0 | 18.7 |
| Not provided or invalid | 513 | 1.4 | 12.3 |
| Total | 36 819 | 100.0 | 17.6 |
↵2-150 In the group “Other maternal or fetal factors”, no breakdown is provided for groups with an incidence lower than 1 per 1000 births, such as malformation of the SNC or genital herpes, although these are computed in the total.