Table 5.
Correlation of Results With Maternal Smoking in Pregnancy.
| Categories | Maternal smoking |
p value | |
|---|---|---|---|
| Yesa (n.22) | No (n.24) | ||
| Cases | |||
| SIDS (n.26) | 20 (77%) | 6 (23%) | <.01 |
| Controls (n.20) | 2 (10%) | 18 (90%) | |
| SNCpc cytoarchitectureb | |||
| Hypoplasia (n.18c) | 15 (83%) | 3 (17%) | <.05 |
| Normal (n.28) | 7 (25%) | 21 (75%) | |
| TH immunoexpression | |||
| Score 0–1 (n.24) | 17 (71%) | 7 (29%) | <.01 |
| Score 2–3 (n.22) | 5 (23%) | 17 (77%) | |
Note. SIDS = sudden infant death syndrome; SNpc = substantia nigra, pars compacta; TH = tyrosine hydroxylase.
a
Smoking 3 to 10 cigarettes a day.
b
Validated by densitometric and quantitative analyses.
c
All belonging to the SIDS group.