Table 2.

APd, ACWd, Cd, and 1/3 of the AP diameter by age group among patients aged 1–18 years.

Age, years	n	APd, cm	ACWd, cm	Cd, cm	1/3 of the APd, cm
1	17	12.0 ± 0.6	1.1 ± 0.1	6.2 ± 0.4	4.0 ± 0.2
2	14	12.5 ± 0.7	1.2 ± 0.2	6.3 ± 0.6	4.2 ± 0.3
3	22	12.7 ± 0.7	1.2 ± 0.1	6.5 ± 0.6	4.2 ± 0.2
4	18	13.3 ± 1.1	1.3 ± 0.2	6.7 ± 0.9	4.4 ± 0.4
5	24	13.9 ± 0.8	1.3 ± 0.2	7.0 ± 0.6	4.6 ± 0.3
6	30	14.1 ± 1.0	1.3 ± 0.3	7.3 ± 0.7	4.7 ± 0.3
7	26	15.0 ± 1.5	1.4 ± 0.3	7.8 ± 1.1	5.0 ± 0.5
8	26	15.5 ± 1.7	1.6 ± 0.4	7.9 ± 0.9	5.2 ± 0.6
9	30	16.5 ± 2.3	1.7 ± 0.6	8.3 ± 1.2	5.5 ± 0.8
10	28	17.3 ± 2.6	1.9 ± 0.7	8.8 ± 1.4	5.8 ± 0.9
11	29	17.0 ± 2.0	1.8 ± 0.5	8.5 ± 1.2	5.7 ± 0.7
12	30	18.4 ± 2.5	2.0 ± 0.6	9.1 ± 1.3	6.1 ± 0.8
13	30	17.6 ± 2.0	1.9 ± 0.4	8.5 ± 1.4	5.9 ± 0.7
14	29	17.8 ± 1.8	1.7 ± 0.5	8.7 ± 1.2	5.9 ± 0.6
15	30	18.3 ± 2.0	1.8 ± 0.4	8.7 ± 1.5	6.1 ± 0.7
16	30	18.7 ± 1.8	1.7 ± 0.4	9.2 ± 1.3	6.2 ± 0.6
17	29	19.8 ± 1.6	1.7 ± 0.4	9.9 ± 1.2	6.6 ± 0.6

APd: anteroposterior diameter; ACWd: anterior chest wall diameter; Cd: compressible diameter.