Table 1.
Characteristics of RSV-Positive and RSV-Negative Patients ≥60 Years of Age With Medically Attended Acute Respiratory Illness, 2004–2005 Through 2015–2016
| All Respiratory Illness | RSV Illness | |||||
|---|---|---|---|---|---|---|
| All RSV-Positive (n = 243), No. (%) | All Non-RSV (n = 2014), No. (%) |
P | RSV A (n = 121), No. (%) |
RSV B (n = 122), No. (%) |
P | |
| Age at enrollment, mean (SD), y | 72.2 (8.7) | 71.5 (8.4) | .2 | 72.1 (8.6) | 72.3 (8.8) | .8 |
| Age group, y | .8 | .8 | ||||
| 60–64 | 55 (23) | 495 (25) | 27 (22) | 28 (23) | ||
| 65–74 | 101 (42) | 836 (42) | 53 (44) | 48 (39) | ||
| 75+ | 87 (36) | 683 (34) | 41 (34) | 46 (38) | ||
| Gender | .1 | .5 | ||||
| Male | 85 (35) | 805 (40) | 40 (33) | 45 (37) | ||
| Female | 158 (65) | 1209 (60) | 81 (67) | 77 (63) | ||
| Enrollment season | .0001 | <.0001 | ||||
| 2004–2005 | 13 (5) | 247 (12) | 11 (9) | 2 (2) | ||
| 2005–2006 | 22 (9) | 99 (5) | 5 (4) | 17 (14) | ||
| 2006–2007 | 16 (7) | 144 (7) | 11 (9) | 5 (4) | ||
| 2007–2008 | 23 (9) | 162 (8) | 10 (8) | 13 (11) | ||
| 2008–2009 | 27 (11) | 132 (7) | 6 (5) | 21 (17) | ||
| 2009–2010 | 29 (12) | 217 (11) | 24 (20) | 5 (4) | ||
| 2010–2011 | 20 (8) | 134 (7) | 9 (7) | 11 (9) | ||
| 2011–2012 | 22 (9) | 104 (5) | 15 (12) | 7 (6) | ||
| 2012–2013 | 12 (5) | 190 (9) | 7 (6) | 5 (4) | ||
| 2013–2014 | 13 (5) | 136 (7) | 2 (2) | 11 (9) | ||
| 2014–2015 | 25 (10) | 252 (13) | 15 (12) | 10 (8) | ||
| 2015–2016 | 21 (9) | 197 (10) | 6 (5) | 15 (12) | ||
| Smoking statusa | <.0001 | .4 | ||||
| Current smoker | 10 (4) | 100 (5) | 3 (2) | 7 (6) | ||
| Current nonsmoker | 228 (94) | 1260 (63) | 115 (95) | 113 (93) | ||
| Unknown/missing | 5 (2) | 654 (32) | 3 (2) | 2 (2) | ||
| High-risk comorbid conditions | ||||||
| COPD | 37 (15) | 444 (22) | .01 | 17 (14) | 20 (16) | .6 |
| CHF | 16 (7) | 211 (10) | .06 | 6 (5) | 10 (8) | .3 |
| Asthma | 33 (14) | 228 (11) | .3 | 15 (12) | 18 (15) | .6 |
| Immune-compromised | 15 (6) | 167 (8) | .3 | 5 (4) | 10 (8) | .2 |
| Diabetes | 51 (21) | 510 (25) | .1 | 20 (17) | 31 (25) | .09 |
| No. of ED visits in the prior 12 mo, median (min–max)b | 0 (0–6) | 0 (0–15) | .5 | 0 (0–3) | 0 (0–6) | .5 |
| No. of hospital admissions in the prior 12 mo, median (min–max)b | 0 (0–6) | 0 (0–13) | .4 | 0 (0–3) | 0 (0–6) | .003 |
| No. of outpatient visits w/ provider in the prior 12 mo, median (IQR)b | 8 (4–13) | 8 (4–15) | 1.0 | 8 (4–12) | 9 (5–15) | .04 |
Abbreviations: CHF, congestive heart failure; COPD, chronic obstructive pulmonary disease; ED, emergency department; IQR, interquartile range; RSV, respiratory syncytial virus.
aSmoking status is missing for a larger proportion of non-RSV illnesses because these cases were not abstracted.
bWilcoxon test was used for differences in medians.