TABLE 1.

Response rates to the NBCUS, 2005 to 2017

Facility type	2017	2015	2013	2011	2009	2007	2005
Community-based collection centers	93.8% (61/65)	90.0% (72/80)	64.8% (59/91)	96.3% (131/136*)	93.3% (126/135*)	91.4% (128/140*)	92.3% (131/142*)
Hospital-based collection centers	85.2% (92/108)	71.8% (102/142)	41.2% (63/153)	N/A†	N/A†	N/A†	N/A†
Hospitals (utilizing blood)	85.5% (2435/2847)‡	73.9% (2138/2892)‡	33.3% (1101/3305)§	42.3% (1342/3175)‡	51.5% (1529/2970)∥	59.9% (1707/2848)¶	56.8% (1604/2825)**
Overall response rate	85.7% (2588/3020)‡	74.2% (2312/3114)‡	34.5% (1223/3549)§	44.5% (1473/3311)‡	53.3% (1655/3105)∥	61.4% (1835/2988)¶	58.5% (1735/2967)**

^*Surveys conducted by AABB (2005–2011) included regional subcenters of collection centers in their total facility count. Number of individual responding collection centers was not available for 2005 to 2011.

^†Surveys conducted before 2011 did not report the unique number of hospital-based collection centers.

^‡The 2011, 2015, and 2017 surveys included a sample of 40% of surgical volume Category 1 (100–999 inpatient surgical operations annually) hospitals.

^§The 2013 survey did not use sampling, but contact information was unavailable for 610 of 3915 hospitals, and these were not sampled.

^∥The 2009 survey included a sample of 33% of surgical volume Category 1 (999–1000 inpatient surgical operations annually).

^¶The 2007 survey included a sample of 33% of surgical volume Category 1 (999–1000 inpatient surgical operations annually) and 66% of surgical volume Category 2 (1000–1399 inpatient surgical operations annually).

^**The 2005 survey included a sample of 32.6% of surgical volume Category 1 (999–1000 inpatient surgical operations annually), 86% of surgical volume Category 2 (1000–1399 inpatient surgical operations annually), and 88.4% of surgical volume Category 3 (1400–2399 inpatient surgical operations annually).