Brief Article
Copyright ©2011 Baishideng Publishing Group Co.
World J Gastroenterol. Mar 21, 2011; 17(11): 1468-1474
Published online Mar 21, 2011. doi: 10.3748/wjg.v17.i11.1468
Table 1 Factor loadings derived from the rotated factor matrix
Factor loadingPercent variance
Factor 1: Straining17.3
Strain hard: How often0.82
Straining: How bad usually0.80
Straining: How long0.76
Straining: How often0.71
How long to bowel motions take0.59
How often incomplete evacuation0.55
How often unsuccessful attempts0.52
Frequency of any bowel problems0.47
How troubling is constipation0.41
Change positions: How often0.35
Factor 2: Pain frequency and severity8.4
Abdominal pain: How often0.80
Pain in belly: Past 3 mo0.79
Abdominal pain: Severity0.79
Abdominal pain: Length0.65
Rectal mucus: How often0.41
Rectal pain: How often0.39
Pain in belly: Past 12 mo-0.58
Factor 3: Duration of constipation6.5
Constipation: How many years0.89
Straining: How many years0.87
Abdominal pain: First occurrence0.57
Factor 4: Irritable bowel syndrome symptoms5.6
Abdominal pain: Improved after bowel motion0.75
Abdominal pain: Improved after passing gas0.70
Experience lower abdominal pain0.63
Bowel motions: Harder than usual past 12 mo0.40
Factor 5: Urge frequency4.1
Urge for bowel motion: How often0.72
Perceive an urge before attempt to open bowels0.68
Visits to toilet: How often0.56
Urgency for bowel motion: How often0.42
Factor 6: Diarrhea frequency3.8
Loose/watery stool: How often0.75
Pebble-like stool: How often-0.42
Rectal disimpaction: How often required-0.45
Hard/lumpy stool: How often-0.63
Factor 7: Alternating between diarrhea and constipation3.4
Usually alternating0.87
Usually constipated-0.86
Factor 8: Bloating frequency3.2
Stomach swelling in the last 12 mo: How often0.71
Felt bloated in the last 12 mo: How often0.68
Felt blocked: How often0.47
Factor 9: Laxative efficacy2.9
Laxative use: Longest gap between taking and bowel motion0.70
Bowel motions: Fewer than usual past 12 mo0.56
Laxative use: How often0.44
Factor 10: Rectal urgency2.7
Urge from rectum0.89
Urge from abdomen and rectum-0.80
Factor 11: Bowel motion frequency2.6
Longest gap between bowel motions0.81
Usual bowel frequency-0.56
Factor 12: Change in bowel frequency2.4
Bowel motions: More than usual past 12 mo0.74
Bowel motions: Looser than usual past 12 mo0.62
Factor 13: Abdominal urge2.3
Experience an urge from abdomen0.89
Factor 14: Diarrhea predominance2.2
Usually experience diarrhea0.79
Factor 15: Antecedent to constipation2.0
An antecedent for the constipation0.71
Experience upper abdominal pain0.51
Total (1-15)69.3
Table 2 Summary of the proportion of patients within each cluster who were positive for constipation1 or irritable bowel syndrome on the basis of Rome III criteria, as well as proportions in each group with slow transit constipation
Clusters (4-fold solution)
1(n = 71)2(n = 44)3(n = 34)4(n = 43)
Rome III constipation
Outlet dysfunction
Colonic transitn = 43n = 28n = 16n = 29
Delayed transit74.40%71.40%62.50%79.30%
Normal transit25.60%28.60%37.50%20.70%