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. Author manuscript; available in PMC: 2021 Nov 3.
Published in final edited form as: Vaccine. 2019 May 18;37(29):3849–3855. doi: 10.1016/j.vaccine.2019.05.051

Table 3.

Distributions of frailty short interview and frailty index by participant characteristics.

Frailty Short Interview Frailty Index
Fraila No. (row %) Non-Frail No. (row %) P-valueb Frailc No. (row %) Non-Frail No. (row %) P-valueb
Age group – % (N)
 18–49 203 (34) 395 (66) <0.001 111 (19) 487 (81) <0.001
 50–64 294 (43) 384 (57) 190 (28) 488 (72)
 65–74 210 (49) 219 (51) 188 (44) 241 (56)
 75+ 189 (52) 176 (48) 186 (51) 179 (49)
Sex – % (N)
 Male 352 (36) 615 (64) <0.001 303 (31) 664 (69) 0.25
 Female 544 (49) 559 (51) 372 (34) 731 (66)
Race – % (N)
 White 676 (43) 908 (57) 0.36 539 (34) 1045 (66) 0.04
 Black 184 (46) 213 (54) 113 (28) 284 (72)
 Other 36 (40) 53 (60) 23 (26) 66 (74)
Hispanic – % (N)d
 No 885 (44) 1142 (56) 0.05 662 (33) 1365 (67) 0.80
 Yes 11 (28) 28 (72) 12 (31) 27 (69)
Home oxygen use – % (N)
 No 603 (38) 1004 (62) <0.001 474 (29) 1133 (71) <0.001
 Yes 292 (63) 168 (37) 201 (44) 259 (56)
Smoking History – % (N)
 Never smoked 316 (37) 536 (63) <0.001 251 (29) 601 (71) <0.001
 Current smoker 204 (49) 216 (51) 105 (25) 315 (75)
 Quit ≥6 months ago 374 (47) 420 (53) 316 (40) 478 (60)
Self-reported vaccine receipt – % (N)
 No 223 (41) 320 (59) 0.25 120 (22) 423 (78) <0.001
 Yes 652 (44) 833 (56) 534 (36) 951 (64)
Influenza infection status – % (N)
 Negative 789 (44) 1009 (56) 0.22 593 (33) 1205 (67) 0.35
 Positive 106 (40) 160 (60) 80 (30) 186 (70)
a

Frailty short interview score ≥0.6.

b

Chi-square test.

c

Frailty Index >0.21.

d

Hispanic ethnicity was unknown for 4 individuals, home oxygen use was unknown for 3 individuals, smoking history was unknown for 4 individuals, and influenza vaccination status was unknown for 42 individuals.