Rectal diameter measured by transabdominal ultrasonography for monitoring treatment response in children with functional constipation

Table 4 Mean rectal diameter at each visit by baseline rectal diameter group

Variables	Mean (95%CI)	Mean change from baseline (95%CI)	P value
Group A (RD < 3 cm) (n = 29)
Baseline	2.35 (2.17-2.54)
Week 1	2.32 (2.16-2.47)	-0.04 (-0.28-0.21)	0.774
Week 4	2.30 (2.15-2.46)	-0.05 (-0.30-0.19)	0.686
Week 8	2.17 (2.00-2.34)	-0.18 (-0.45-0.08)	0.177
Group B (RD ≥ 3 cm) (n = 15)
Baseline	3.33 (3.10-3.57)
Week 1	2.75 (2.53-2.96)	-0.59 (-0.90 to -0.28)	< 0.001
Week 4	2.73 (2.52-2.95)	-0.60 (-0.93 to -0.28)	< 0.001
Week 8	2.63 (2.39-2.87)	-0.70 (-1.05 to -0.35)	< 0.001

RD: Rectal diameter.