Age range of children whose CT studies were examined for the presence of crista galli pneumatization
| Age Range (yr) | No. of Patients | No. with Pneumatization of Crista Galli | No. of Children with Beginning Frontal Sinus Development (0–7 yr) |
|---|---|---|---|
| 0–1 | 46 | 0 | |
| 1–2 | 25 | 0 | |
| 2–3 | 16 | 0 | |
| 3–4 | 11 | 0 | |
| 4–5 | 7 | 0 | 4 |
| 5–6 | 16 | 0 | 6 |
| 6–7 | 11 | 0 | 3 |
| 7–8 | 11 | 0 | |
| 8–9 | 14 | 1 | |
| 9–10 | 16 | 0 | |
| 10–11 | 18 | 1 | |
| 11–12 | 20 | 2 | |
| Total | 211 | 4 |