Table 2.

Comparison of basic manometric parameters between ARMs patients and non-operative controls.

Age Group	Number	HPZ-length		p-value	HPZ-rest		p-value	HPZ-sqze		p-value
	patients:controls	patients	controls		patients	controls		patients	controls
3–12 months	30:16	2.48 ± 0.46	2.32 ± 0.34	0.172	32.72 ± 12.30	43.94 ± 14.86	0.002*	108.11 ± 35.35	114.59 ± 34.60	0.525
1–4 years	82:24	2.65 ± 0.52	2.45 ± 0.42	0.099	28.08 ± 10.54	43.05 ± 11.12	<0.001*	99.78 ± 35.13	107.90 ± 45.30	0.410
>4 years	30:31	2.69 ± 0.60	2.64 ± 0.50	0.713	28.38 ± 11.90	55.97 ± 12.72	<0.001*	91.04 ± 29.74	141.46 ± 35.69	<0.001*
Total	142:71	2.57 ± 0.51	2.50 ± 0.45	0.307	30.43 ± 11.80	48.89 ± 14.03	<0.001*	102.61 ± 34.84	125.09 ± 41.21	<0.001*

HPZ-length, the functional length of anorectal high-pressure zone; HPZ-rest, resting pressure of high-pressure zone; HPZ-sqze, squeeze pressure of high-pressure zone. Data was reported as mean ± standard deviation.

^*The difference was statistically significant.