Digital Rectal Examination Standardization for Inexperienced Hands: Teaching Medical Students

Table 2

BOOI ranking of PV US, PV DRE, PSA, IPSS, and PVR means.

Kruskal-Wallis test					PV-US (cc); 𝑃=0.033		PV-DRE (cc); 𝑃=0.026
BOOI	𝑁	PSA; (ng/dL)	IPSS	PVR; (mL)	Mean (cc)	SD	Mean (cc)	SD
Nonobstructed; (<20)	12	1.5	6	15	29.8	19.4	20	10
Inconclusive; (20–40)	14	2.3	8	30	43.2	33.1	35	15
Obstructed; (>40)	22	4.5	17	120	53.6	32.9	60	15

BOOI: bladder outlet obstruction index.
PV: prostate volume.
US: transabdominal ultrasound.
DRE: standardized digital rectal examination.
SD: standard deviation.
IPSS: international prostatic symptom score.
PVR: postvoiding residue.