Table 1. Clinical Characteristics of the Study Sample.
| Variable | Inhaled Corticosteroid & Albuterol (N = 7,156) | Albuterol Only (N = 12,287) | Total (N = 19,443) |
|---|---|---|---|
| Age, mean (SD), y at index | 34.0 (18.0) | 30.5 (18.6) | 31.8 (18.5) |
| Women, No. (%) | 4,709 (65.8) | 7,151 (58.2) | 11,860 (61.0) |
| Black race, No. (%) | 3,714 (51.9) | 6,303 (51.3) | 10,017 (51.5) |
| Asthma, No. (%) | 6,083 (85.0) | 11,181 (91.0) | 17,264 (88.8) |
| COPD | 1,073 (15.0) | 1,106 (9.0) | 2,179 (11.2) |
| Cigarette smoking, No. (%) | 1,169 (16.3) | 1,119 (9.1) | 2,288 (11.8) |
| Alcohol use, No. (%) | 973 (13.6) | 1,769 (14.4) | 2,742 (14.1) |
| Oral thrusha, No. (%) | 14 (0.2) | 12 (0.1) | 26 (0.1) |
| GERDa, No. (%) | 651 (9.1) | 369 (3.0) | 1,020 (5.2) |
| Iron medicationsa, No. (%) | 372 (5.2) | 700 (5.7) | 1,072 (5.5) |
| NSAIDsa, No. (%) | 2,476 (34.6) | 3,576 (29.1) | 6,052 (31.1) |
| Potassium supplements, No. (%) | 964 (13.5) | 750 (6.1) | 1,714 (8.8) |
| Oral Steroida, No. (%) | 1,553 (21.7) | 1,290 (10.5) | 2,843 (14.6) |
| Spacer devicea, No. (%) | 5,331 (74.5) | 7,077 (57.6) | 12,408 (63.8) |
| Theophyllinea, No. (%) | 444 (6.2) | 491 (4.0) | 935 (4.8) |
| Alendronatea, No. (%) | 7 (0.1) | 12 (0.1) | 19 (0.1) |
SD = standard deviation
COPD = chronic obstructive pulmonary disease
GERD = gastroesophageal reflux disease
NSAID = non-steroidal anti-inflammatory drug
a
Recorded after the index date but within 6 months of the event or censoring date.