Epidemiology of inflammatory bowel disease among an indigent multi-ethnic population in the United States

Figures & data

Figure 1 The CD:UC ratio among the total study population by race/ethnicity. Hispanics were diagnosed more often with UC than with CD, Caucasians were diagnosed more often with CD than with UC, and African-Americans were diagnosed more often with CD than with UC, but the difference was not significant.

Notes: *P is significant at levels <0.05. **P is significant at levels <0.001.
Abbreviations: IBD; inflammatory bowel disease; CD, Crohn’s disease; UC, ulcerative colitis.

Table 1 The mean age of diagnosis/presentation of inflammatory bowel disease by gender among the 273 adults in the study

	All patients (N = 273)				Crohn’s disease (N = 147)				Ulcerative colitis (N = 126)
	Total number	Mean age	± SD	P	Total number	Mean age	± SD	P	Total number	Mean age	± SD	P
Total population
Males	125	40.1	13.9	0.02*	63	38.2	15.1	0.001*	62	41.5	13.5	0.03*
Females	148	46.4	13.9		84	46.0	13.0		64	47.0	15.3
African-Americans
Males	48	39.2	14.1	0.001*	30	38.8	13.9	0.03*	18	40.5	14.1	0.02*
Females	72	48.1	13.8		38	46.1	13.1		34	50.4	14.0
Caucasians
Males	37	41.2	13.5	0.65	18	36.8	13.6	0.05*	19	44.6	12.4	0.45
Females	46	44.1	13.1		36	44.4	12.8		10	40.5	14.8
Hispanics
Males	40	40.2	15.0	0.08	15	39.0	19.6	0.07	25	39.9	14.1	0.34
Females	30	46.1	15.2		10	50.5	11.4		20	44.4	16.8

Note:

* P is significant at levels <0.05.

Abbreviation: SD, standard deviation.

Figure 2 The distribution rates of Crohn’s disease (CD) phenotype by race/ethnicity among the 147 patients with CD. Hispanics have twice the rate of fistualzing disease than African-Americans or Caucasians. There were no significant differences in the distribution rates of inflammation and strictures between the three ethnic groups.