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Table 2 Foot length growth percentage in reference feet* and in clubfeet**

From: Development of foot length in children with congenital clubfoot up to 7 years of age: a prospective follow-up study

Age interval (years) Reference Clubfeet P value
n mean (SD) n mean (SD)
2–2.5 36 5.4 (4) 61 5.4 (4) 0.971
2.5–3 36 5.0 (3) 65 4.4 (3) 0.300
3–3.5 37 3.5 (2) 61 3.9 (2) 0.362
3.5–4 38 3.3 (2) 62 2.9 (2) 0.329
4–4.5 42 3.4 (2) 69 2.8 (2) 0.077
4.5–5 39 2.9 (2) 67 3.0 (2) 0.900
5–5.5 32 2.8 (2) 55 2.5 (2) 0.419
5.5–6 30 2.4 (2) 52 2.7 (2) 0.464
6–6.5 34 2.4 (2) 55 2.9 (2) 0.203
6.5–7 31 2.6 (2) 49 2.3 (2) 0.688
Total (2–7) 28 40 (6) 49 38 (7) 0.216
n, number of measurements; SD, standard deviation. P values after Student’s t test. Significance set up to P < 0.005 after Bonferroni correction. *Contralateral feet in children with unilateral clubfoot. ** unilateral and bilateral (one randomly selected foot from each child was included)