DNAH5 and primary ciliary dyskinesia: Of these, 10 carried pathogenic mutations in either DNAH5 or DNAI1. In children with PCD, body length/height progressively decreased from +0.40 ± 0.24 SDS (the 1st birthday), +0.16 ± 0.23 SDS (3 years old), and −0.13 ± 0.21 SDS (5 years old) to −0.54 ± 0.19 SDS (7 years old; P = 0.01 versus 0), −0.67 ± 0.21 SDS (9 years old; P = 0.005 versus 0), −0.52 ± 0.24 SDS (11 years old; P = 0.04 versus 0), and −0.53 ± 0.23 SDS (13 years old; P = 0.03 versus 0).