Change in renal function after sodium phosphate preparation for screening colonoscopy

Table 4 Description of the design, demographic characteristics, and effect estimate in previous studies

	Design	Population	Race (%)	Control	Timing of Follow-up	Association between NaP exposure and incident kidney injury
Abaskharoun et al[9]	RC	Any patients who had outpatient CFS	Not reported	PEG	3 mo-9 yr	No
Brunelli et al[10]	CC	Any patients who had outpatient CFS	White 46%, Non-white 52%, Unknown 2.3%	Any non-NaP preparation	Within 6 mo	No
Hurst et al[11]	RC	Any patients who had screening CFS	White 54%, Black 19%, Unknown 27%	PEG	Within 1 yr	Yes
Khurana et al[12]	RC	Any patients1	White 84%, Black 8%, Hispanic 7%, Asian 0.5%	No bowel preparation	6-9 mo/ 12-18 mo	Yes
Russmann et al[13]	RC	Any patients who had CFS	Not reported	PEG	Within 6 mo	No
Singal et al[14]	RC	Any patients who had CFS	White 27%, Black 53%, Hispanic 20%, Asian 0.3%	PEG	Within 1 yr	Yes

¹Excluded patients who had acute colonoscopic indication or systemic conditions which affect the renal functional deterioration. RC: Retrospective cohort; CFS: Colonofiberoscopy; CC: Case-control.