Table 2.
Baseline characteristics of participants with classified emergency department visits or hospitalizations
| HCHS/SOL |
MESA | ||
|---|---|---|---|
| ED Visits | Hospitalizations | Hospitalizations | |
| Classified events, n | 56 | 61 | 99 |
| Primary discharge ICD diagnosis code | |||
| COPD (ICD-9 codes 496, 506.4; or ICD-10 code J44) | 0 | 0 | 15 (15%) |
| Emphysema (ICD-9 code 492 or ICD-10 code J43) | 0 | 0 | 3 (3%) |
| Bronchitis (ICD-9 codes 490–491 or ICD-10 codes J40–J42) | 3 (5%) | 1 (2%) | 40 (40%) |
| Asthma (ICD-9 code 493 or ICD-10 codes J45–J46) | 17 (30%) | 12 (20%) | 41 (41%) |
| Any CLRD | 20 (36%) | 13 (21%) | 99 (100%) |
| Participants, n | 50 | 56 | 75 |
| Age, yr | 51 (13) | 54 (12) | 67 (8.8) |
| Male sex | 6 (15%) | 17 (34%) | 29 (39%) |
| Body mass index, kg/m2 | 31 (6) | 32 (9) | 30 (8) |
| Race/ethnicity | |||
| White | — | — | 29 (39%) |
| African American | — | — | 24 (32%) |
| Hispanic/Latino | 50 (100%) | 56 (100%) | 15 (20%) |
| Asian | — | — | 7 (9%) |
| Smoking status | |||
| Never | 23 (47%) | 23 (43%) | 19 (25%) |
| Former | 16 (33%) | 14 (26%) | 31 (41%) |
| Current | 10 (20%) | 17 (32%) | 25 (33%) |
| Pack-years of smoking | 15 (15) | 20.0 (17) | 36.5 (26) |
| Self-reported CLRD | |||
| Asthma | 36 (77%) | 36 (68%) | 36 (36%) |
| COPD, emphysema, or chronic bronchitis | 17 (36%) | 21 (40%) | 12 (16%) |
| Baseline spirometry | |||
| FEV1, % predicted, L | 74 (25) | 76 (22) | 68 (32) |
| FEV1/FVC ratio | 0.75 (0.11) | 0.73 (0.12) | 0.58 (0.17) |
| Airflow limitation | 14 (35%)* | 15 (30%)* | 24 (65%)† |
| Restrictive pattern | 9 (23%)* | 13 (26%)* | 2 (5%)† |
Definition of abbreviations: CLRD = chronic lower respiratory disease; COPD = chronic obstructive pulmonary disease; ED = emergency department; HCHS/SOL = Hispanic Community Health Study/Study of Latinos; ICD = International Classification of Diseases; MESA = Multi-Ethnic Study of Atherosclerosis.
Airflow limitation is defined as a prebronchodilator FEV1/FVC ratio <0.70. A restrictive pattern is defined as a prebronchodilator FEV1/FVC ratio ≥0.70 and an FVC percent predicted <80%.
Values are presented as mean (SD) or frequency (percent), with the percentages calculated out of participants with nonmissing data.
In HCHS/SOL, 88 of 102 participants with classified events had valid spirometric measures.
In MESA, 37 of 75 participants with classified events had valid spirometric measures that were performed in 2004–2006 (approximately 4 yr after baseline examination and initiation of event follow-up).