Table 1.
Characteristics of source population and patients who responded and did not respond to the baseline survey, CRISP epidemiology study, 2014
| Variable | Population eligible for the baseline survey | Population who received baseline survey | Baseline survey responders | Baseline survey non-responders | Responders vs. non-responders (p-value) |
|---|---|---|---|---|---|
|
| |||||
| Number, total | 200,725 | 23,700 | 7,847 | 15,853 | |
|
| |||||
| Age (years)*, mean (SD) | 50.15 (18.45) | 49.39 (17.38) | 55.04 (16.09) | 46.57 (17.33) | <0.0001 |
|
| |||||
| Race/ethnicity, n (%) | <0.0001 | ||||
| White | 192,356 (95.8) | 19,208 (81.0) | 7,095 (90.4) | 12,113 (76.4) | |
| Black | 3,984 (2.0) | 2,171 (9.2) | 342 (4.4) | 1,829 (11.5) | |
| Hispanic | 4,385 (2.2) | 2,321 (9.8) | 410 (5.2) | 1,911 (12.1) | |
|
| |||||
| Sex, n (%) | |||||
| Female | 113,592 (56.6) | 14,157 (59.7) | 4,921 (62.7) | 9,236 (58.3) | <0.0001 |
| Male | 87,133 (43.4) | 9,543 (40.3) | 2,926 (37.3) | 6,617 (41.7) | |
|
| |||||
| Medical record groups**, n (%) | <0.0001 | ||||
| CRS codes | 13,481 (6.7) | 12,549 (53.0) | 4,800 (61.2) | 7,749 (48.9) | |
| Asthma/allergy codes | 49,917 (24.9) | 6,093 (25.7) | 1,843 (23.5) | 4,250 (26.8) | |
| No sinus codes | 137,327 (68.4) | 5,058 (21.3) | 1,204 (15.3) | 3,854 (24.3) | |
|
| |||||
| History of receiving Medical Assistance, n (%) | 27,494 (13.7) | 4,427 (18.7) | 969 (12.4) | 3,458 (21.8) | <0.0001 |
|
| |||||
| Charlson co-morbidity index score, n (%) | |||||
| 0 | 47,153 (23.5) | 4,488 (18.9) | 851 (10.8) | 3,637 (22.9) | |
| 1 | 36,229 (18.1) | 4,802 (20.3) | 1,244 (15.9) | 3,558 (22.4) | |
| 2 | 31,013 (15.4) | 3,898 (16.5) | 1,348 (17.2) | 2,550 (16.1) | |
| 3 | 25,827 (12.9) | 3,258 (13.7) | 1,299 (16.5) | 1,959 (12.4) | <0.0001 |
| 4+ | 60,503 (30.1) | 7,254 (30.6) | 3,105 (39.6) | 4,149 (26.2) | |
*
Age at median date of survey return dates
**
Primary care patients selected based on evidence of CRS, asthma, and allergic conditions in electronic health record: high = two or more ICD-9 codes 471.x or 473.x or CPT codes for sinus surgery, sinus endoscopy or sinus CT; moderate = one ICD-9 code for 471.x or 473.x or two or more ICD-9 codes for asthma (493.x) or allergic rhinitis (477.x); low = does not meet criteria for moderate or high.