Table 3.

Number and Mean Breast Utilization and Mean Nonbreast Utilization by Immediate Reading Status

	Immediate Reading
	Yes (n = 564)	No (n = 576)	Unadjusted p-Value*
Number breast procedures and visits
Mammograms
Same day extra views	501	330	< 0.001
Different mammogram date(s)	280	420	< 0.001
Total mammograms	781	750	.018
Ultrasounds	176	219	.016
Aspirations	42	38	.416
Biopsies	64	83	.474
Sub-total: breast-related procedures	1,063	1,090	.839
Nonprocedure breast visit	554	586	.680
Total: all breast procedures and nonprocedure visits	1,617	1,676	.641

				Adjusted Incidence Ratio†
Mean breast and nonbreast utilization
Breast utilization
Mean (SD)	2.87 (1.85)	2.91 (2.07)
Median	2	2	.641	0.97 (0.89, 1.06)
Nonbreast utilization
Mean (SD)	9.48 (10.31)	9.69 (13.13)
Median	7	6	.115	0.93 (0.82, 1.05)
Mental health utilization
Mean (SD)	0.81 (3.64)	0.48 (2.20)
Median	0	0	.462	N/A‡

^*Wilcoxon's two-sided Z-approximation.

^†Negative binomial model with covariates for age, education (high school or less versus at least some college), race (white versus other), Charlson comorbidy score, and site. The incidence ratio gives the ratio of the number of visits in 1 year after the screening mammogram by women in the immediate reading group relative to the number of visits by women in the batch reading group.

^‡No multivariable analyses of mental health visits were conducted due to the limited number of women with any mental health visits.