Table 3.

Studies using objective measurements, with estimates based on case definition of gastroparesis, by first author.

	“Definite”	“Probable”	“Possible”
Jung, et al. 2009 *	Case Definitions
	(A) Scintigraphic delayed GE AND (B) ≥ 3 months of typical symptoms	Met criteria (B) AND (C) Food retention on EGD or upper GI study	Met criteria (A) without symptoms OR Met only criteria (B)
	Prevalence* per 100,000 persons (95% CI)
	24.2 (15.7 – 32.6)	33.4 (23.3 – 43.4)	50.5 (38.1 – 62.8)
	Incidence* per 100,000 person-years (95% CI)
	6.3 (4.9 – 7.7)	9.8 (8.1 – 11.6)	17.2 (14.9 – 19.5)
Ye, et al. 2022 (USA)	Case Definitions
	(A) 1 inpatient OR 2 outpatient diagnoses 30 day apart AND (B) Scintigraphic delayed GE within 90 days AND (C) ≥ 3 months of typical symptoms	Met criteria (A) and (C) OR Met criteria (A) and (B)	Met only criteria (A)
	PrevalenceΔ per 100,000 persons (95% CI)
	21.5 (20.6 – 22.4)	126.8 (124.8 – 128.8)	93.7 (92.0 – 95.4)
	Incidence per 100,000 person-years (95% CI)
	Not estimated	Not estimated	Not estimated
Choung, et al. 2012		Case Definitions
	(A) Scintigraphic delayed GE	(B) ≥ 3 months of typical symptoms AND (C) Food retention on EGD or upper GI study	Met criteria (B) AND (D) Physician diagnosis of gastroparesis
	Prevalence§ per 100,000 persons (95% CI)
	Not estimated	Not estimated	Not estimated
	Incidence§ per 100,000 person-years (95% CI)
	Not estimated	Not estimated	Not estimated

^*Estimates are inclusive of patients that also met stricter case definitions. For example, “probable” GP estimates also included patients that met “definite” criteria; “possible” included patients that met any of the case definitions.

^†Standardized to age and sex of USA white population in the year 2000.

^ΔStandardized to age, sex, and geographic region.

^§Estimates for each method of diagnosis was not provided.

CI, confidence interval; EGD, esophagogastroduodenoscopy; GE, gastric emptying; GI, gastrointestinal; UK, United Kingdom; USA, United States of America