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Table 1 estimated mean and 95% confidence interval (CI) of antero-posterior interphyseal angle (AP-IPA) and lateral interphyseal angle (L-IPA) by age, according to the predictive model of spontaneous correction

From: Deformity progression in congenital posteromedial bowing of the tibia: a report of 44 cases

AGE (years) AP-IPA (°) L-IPA (°)
ESTIMATED MEAN 95% CI ESTIMATED MEAN 95% CI
0 40 38–43 29 17–40
1 24 21–26 24 14–34
2 19 15–23 20 12–27
3 16 11–21 16 10–23
4 14 8–19 13 8–18
5 12 6–18 11 7–15
6 11 5–17 9 5–12
7 10 3–16 7 4–10
8 9 2–16 6 4–8
9 8 1–15 5 3–7
10 7 0–15 4 2–6
11 6.5 -1 – 14 3 2–5
12 6 −2 – 14 3 2–4
13 5 −3 – 13 2 1–3
14 5 −3 – 13 2 1–2
15 4 −4 – 12 1 1–2
16 4 −4 – 12 1 1–2
17 3 −5 – 12 1 1–1
18 3 −6 – 12 1 0–1