Skip to main content
. Author manuscript; available in PMC: 2011 Apr 1.
Published in final edited form as: Vox Sang. 2009 Dec 10;98(3 Pt 1):e219–e224. doi: 10.1111/j.1423-0410.2009.01274.x

Table 3.

Number & Percentage of First Time Donors (FTD) who Returned for Subsequent Donations (By Gender and Age Group)

Control Test Group

Age September11–30, 2000 Returned to Donate by March31, 2001 Percentage within Group Age September 11–30, 2001 Returned to Donate by March 31, 2002 Percentage within Group Percentage Difference
FTD Female < 20 years 212 63 29.72% FTD Female < 20 years 228 61 26.75% −2.96%
20–29 years 154 46 29.87% 20–29 years 485 133 27.42% −2.45%
30–39 years 156 52 33.33% 30–39 years 502 179 35.66% 2.32%
40–49 years 136 48 35.29% 40–49 years 473 166 35.10% −0.20%
50–59 years 77 30 38.96% 50–59 years 332 138 41.57% 2.61%
60+ years 36 16 44.44% 60+ years 121 52 42.98% −1.47%
Subtotal 771 255 33.07% Subtotal 2141 729 34.05% 0.98%

FTD Male < 20 years 122 32 26.23% FTD Male < 20 years 108 35 32.41% 6.18%
20–29 years 102 32 31.37% 20–29 years 219 50 22.83% −8.54%
30–39 years 108 40 37.04% 30–39 years 290 92 31.72% −5.31%
40–49 years 86 27 31.40% 40–49 years 257 75 29.18% −2.21%
50–59 years 56 25 44.64% 50–59 years 206 66 32.04% −12.60%
60+ years 34 16 47.06% 60+ years 94 40 42.55% −4.51%
Subtotal 508 172 33.86% Subtotal 1174 358 30.49% 3.36%

Total FTD 1279 427 33.39% Total FTD 3315 1087 32.79% 0.60%