Table 3. Application of ICD-PM codes to classify spontaneous preterm labour neonatal deathsa recorded in South African Perinatal Problem Identification Program, 1 October 2013–31 December 2016.
| Maternal condition | Perinatal condition as classified by Perinatal Problem Identification Program |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Idiopathic preterm labour |
Premature rupture of membranes |
Iatrogenic preterm delivery for no real reason |
Premature rupture of membranes with chorioamnionitis |
Cervical incompetence |
Preterm labour with chorioamnionitis with intact membranes |
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| ICD-PM code | No. (%) | ICD-PM code | No. (%) | ICD-PM code | No. (%) | ICD-PM code | No. (%) | ICD-PM code | No. (%) | ICD-PM code | No. (%) | |
| Healthy | N9 M3 P03.8 | 1458 (68.7) | N9 M2 P01.1 | 205 (9.7) | N9 M5 | 62 (2.9) | N9 M2 P01.1 | 21 (1.0) | N9 M2 P01.0 | 15 (0.7) | N9 M1 P02.7 | 11 (0.5) |
| Coincidental conditions | N9 M4 P00.5 | 33 (1.6) | N9 M4 P00.5 | 6 (0.3) | N9 M4 P00.5 | 1 (0.1) | N9 M4 P00.5 | 0 (0.0) | N9 M4 P00.5 | 0 (0.0) | N9 M4 P00.5 | 0 (0.0) |
| Medical and surgical disordersb | N9 M4 P00.0–P00.9 | 67 (3.2) | N9 M4 P00.0–P00.9 | 21 (1.0) | N9 M4 P00.0–P00.9 | 2 (0.1) | N9 M4 P00.0–P00.9 | 3 (0.1) | N9 M4 P00.0–P00.9 | 3 (0.1) | N9 M4 P00.0–P00.9 | 1 (0.1) |
| Non-pregnancy-related infection | N9 M4 P00.2 | 61 (2.9) | N9 M4 P00.2 | 6 (0.3) | N9 M4 P00.2 | 3 (0.1) | N9 M4 P00.2 | 3 (0.1) | N9 M4 P00.2 | 2 (0.1) | N9 M4 P00.2 | 4 (0.2) |
| Extrauterine pregnancy | N9 M2 P01.4 | 1 (0.1) | N9 M2 P01.4 | 1 (0.1) | N9 M2 P01.4 | 0 (0.0) | N9 M2 P01.4 | 0 (0.0) | N9 M2 P01.4 | 0 (0.0) | N9 M2 P01.4 | 0 (0.0) |
| Pregnancy-related sepsis | N9 M1 P02.7 | 9 (0.4) | N9 M1 P02.7 | 9 (0.4) | N9 M1 P02.7 | 2 (0.1) | N9 M1 P02.7 | 18 (0.8) | N9 M1 P02.7 | 1 (0.1) | N9 M1 P02.7 | 6 (0.3) |
| Obstetric haemorrhage | N9 M1 P02.1 | 10 (0.5) | N9 M1 P02.1 | 5 (0.2) | N9 M1 P02.1 | 1 (0.1) | N9 M1 P02.1 | 1 (0.1) | N9 M1 P02.1 | 0 (0.0) | N9 M1 P02.1 | 2 (0.1) |
| Hypertension | N9 M4 P00.0 | 50 (2.4) | N9 M4 P00.0 | 11 (0.5) | N9 M4 P00.0 | 2 (0.1) | N9 M4 P00.0 | 2 (0.1) | N9 M4 P00.0 | 0 (0.0) | N9 M4 P00.0 | 0 (0.0) |
| Anaesthetic complications | N9 M4 P04.0 | 1 (0.1) | N9 M4 P04.0 | 1 (0.1) | N9 M4 P04.0 | 0 (0.0) | N9 M4 P04.0 | 0 (0.0) | N9 M4 P04.0 | 0 (0.0) | N9 M4 P04.0 | 0 (0.0) |
ICD-PM: International Classification of Diseases-perinatal mortality.
a Since birth weights of > 1000 g at ≥ 28 weeks gestation were analysed, the only categories applicable for N9 were P07.1 (other low birth weight; 2051 deaths) and P07.3 (other preterm infants; 70 deaths); these groups were combined due to the small number in P07.3 to demonstrate how maternal codes can be applied for improved classification.
b The Perinatal Problem Identification Program maternal condition category medical and surgical disorders includes cardiac disease (M4 P00.3), endocrine disease (M4 P00.9), gastrointestinal disease (M4 P00.9), central nervous system disease (M4 P00.9), respiratory disease (M4 P00.3), haematological disease (M4 P00.3), genitourinary disease (M4 P00.1), autoimmune disease (M4 P00.9), skeletal disease (M4 P00.9), psychiatric disease (M4 P00.9), neoplastic disease (M4 P00.9), or other medical and surgical disorders (M4 P00.9) using ICD-PM coding.