Table 4.

Comparison of outcomes by PP analysis.

Outcomes	Formula LRD group (n = 273)	Self-prepared LRD group (n = 269)	P
Adequate bowel preparation rate	260 (95.2)	221 (82.2)	<0.001
Excellent bowel preparation rate	95 (34.8)	34 (12.6)	<0.001
BBPS scores
Right colon	2.43 ± 0.52	2.02 ± 0.61	<0.001*
Transverse colon	2.77 ± 0.42	2.38 ± 0.61	<0.001*
Left colon	2.73 ± 0.45	2.41 ± 0.56	<0.001*
Total scores	7.93 ± 1.00	6.80 ± 1.41	<0.001*
Cecal intubation time, minutes	6.18 (4.49)	6.88 (5.78)	0.117
Withdrawal time, minutes	8.11 (2.66)	7.81 (3.29)	0.246
Adenoma detection rate	70 (25.6)	43 (16.0)	0.006

LRD, low-residue diet; BBPS, the Boston bowel preparation scale.

^*The p-value was calculated by the Wilcoxon–Mann–Whitney test.