Table 2.
Subgroup analyses of joint and back pain according to precipitation on day of outpatient visit
| Subgroups | Adjusted proportion of outpatient visits with a diagnosis of joint or back pain | ||
|---|---|---|---|
| No rain (%) | Rain (%) | Difference (95% CI) | |
| Region: | |||
| North east (n=1 884 752) | 6.44 | 6.40 | −0.04 (−0.12 to 0.04) |
| Midwest (n=2 297 189) | 6.16 | 6.16 | 0.0 (−0.1 to 0.1) |
| South (n=5 008 055) | 6.32 | 6.32 | 0.0 (−0.1 to 0.1) |
| West (n=2 483 396) | 6.72 | 6.47 | −0.2 (−0.4 to −0.1) |
| Age (years): | |||
| 65-74 (n=4 874 112) | 6.39 | 6.34 | −0.04 (0.00 to 0.00) |
| 75-84 (n=4 619 117) | 6.47 | 6.42 | −0.05 (0.00 to 0.00) |
| ≥85 (n=2 180 163) | 6.24 | 6.24 | 0.00 (0.00 to 0.00) |
| Race: | |||
| White (n=10 042 348) | 6.30 | 6.27 | −0.03 (−0.08 to 0.01) |
| Black (n=891 652) | 6.98 | 6.84 | −0.14 (−0.31 to 0.02) |
| Asian (n=295 834) | 6.85 | 6.86 | 0.01 (−0.39 to 0.41) |
| Hispanic (n=223 806) | 7.30 | 7.34 | 0.03 (−0.32 to 0.38) |
| Other (n=219 752) | 6.51 | 6.56 | 0.05 (−0.25 to 0.36) |
| Rheumatoid arthritis: | |||
| Yes | 8.15 | 8.04 | −0.11 (−0.16 to −0.05) |
| No | 3.42 | 3.50 | 0.08 (0.01 to 0.14) |