Table 1.
Weighted Patient Demographics
| Variable | Overall (N = 2,622,926) |
Non-Hispanic Caucasian (N = 1,535,794) |
Non-Hispanic African American (N = 356,582) |
Hispanic (N = 665,173) |
Non-Hispanic Other (N = 65,377) |
SMDa |
|---|---|---|---|---|---|---|
| Patient age in years, mean (SD) | 33.98 (11.57) | 34.83 (11.70) | 29.86 (10.18) | 32.65 (11.28) | 39.67 (10.76) | 0.553 |
| Waiting time to see physician,mean (SD) | 53.17 (100.79) | 47.74 (105.69) | 71.27 (62.60) | 61.53 (102.59) | 51.43 (37.33) | 0.078 |
| Length of visit, mean (SD) | 306.79 (346.89) | 291.03 (376.73) | 312.22 (159.84) | 351.82 (321.57) | 288.07 (210.39) | 0.190 |
| Presenting level of pain, mean (SD) | 7.43 (2.68) | 7.25 (2.72) | 7.79 (2.48) | 7.77 (2.61) | 7.49 (2.72) | 0.066 |
| Patient sex = male, n (%) | 764,891 (29.2%) | 525,434 (34.2%) | 41,247 (11.6%) | 180,754 (27.2%) | 17,456 (26.7%) | 0.280 |
| Geographic region, n (%) | 1.051 | |||||
| Northeast | 295,689 (11.3%) | 211,072 (13.7%) | 5293 (1.5%) | 79,324 (11.9%) | 0 (0.0%) | |
| Midwest | 675,728 (25.8%) | 438,103 (28.5%) | 141,208 (39.6%) | 89,011 (13.4%) | 7406 (11.3%) | |
| South | 883,832 (33.7%) | 511,692 (33.3%) | 166,079 (46.6%) | 200,280 (30.1%) | 5781 (8.8%) | |
| West | 767,677 (29.3%) | 374,927 (24.4%) | 44,002 (12.3%) | 296,558 (44.6%) | 52,190 (79.8%) | |
| Expected insurance, n (%) | 0.542 | |||||
| Private insurance | 1,155,652 (44.1%) | 823,347 (53.6%) | 125,341 (35.2%) | 166,197 (25.0%) | 24,610 (37.6%) | |
| Nonprivate insurance | 1,311,991 (50.0%) | 662,818 (43.2%) | 187,303 (52.5%) | 437,260 (65.7%) | 0 (0.0%) | |
| Emergent = Yes, n (%) | 170,975 (6.5%) | 109,522 | (7.1%) 18,726 (5.3%) | 39,684 (6.0%) | 3043 (4.7%) | 0.541 |
| Number of comorbidities, n (%) | 0.236 | |||||
| 0 | 2,478,209 (94.5%) | 1,432,417 (93.3%) | 348,417 (97.7%) | 631,998 (95.0%) | 65,377 (100.0%) | |
| 1 | 134,588 (5.1%) | 93,248 (6.1%) | 8165 (2.3%) | 33,175 (5.0%) | 0 (0.0%) | |
| 2 | 8367 (0.3%) | 8367 (0.5%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | |
| 3 | 1762 (0.1%) | 1762 (0.1%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | |
| Standard work hours (8 AM–5 PM), n (%) | 1,092,739 (41.7%) | 638,787 (41.6%) | 196,936 (55.2%) | 241,824 (36.4%) | 15,192 (23.2%) | 0.382 |
| Year, n (%) | 0.830 | |||||
| 2010 | 534,283 (20.4%) | 306,877 (20.0%) | 71,098 (19.9%) | 126,414 (19.0%) | 29,894 (45.7%) | |
| 2011 | 621,863 (23.7%) | 455,615 (29.7%) | 30,661 (8.6%) | 120,080 (18.1%) | 15,507 (23.7%) | |
| 2012 | 549,445 (21.9%) | 303,723 (19.8%) | 70,217 (19.7%) | 155,529 (23.4%) | 19,976 (30.6%) | |
| 2013 | 361,917 (13.8%) | 194,154 (12.6%) | 66,953 (18.8%) | 100,810 (15.2%) | 0 (0.0%) | |
| 2014 | 555,418 (21.2%) | 275,425 (17.9%) | 117,653 (33.0%) | 162,340 (24.4%) | 0 (0.0%) | |
| Month of visit, n (%) | 0.864 | |||||
| January | 266,466 (10.2%) | 114,379 (7.4%) | 27,422 (7.7%) | 117,533 (17.7%) | 7132 (10.9%) | |
| February | 191,216 (7.3%) | 127,659 (8.3%) | 18,354 (5.1%) | 40,303 (6.1%) | 4900 (7.5%) | |
| March | 334,234 (12.7%) | 206,129 (13.4%) | 45,344 (12.7%) | 80,175 (12.1%) | 2586 (4.0%) | |
| April | 289,386 (11.0%) | 134,016 (8.7%) | 88,800 (24.9%) | 61,839 (9.3%) | 4731 (7.2%) | |
| May | 228,030 (8.7%) | 118,631 (7.7%) | 67,424 (18.9%) | 30,121 (4.5%) | 11,854 (18.1%) | |
| June | 126,621 (4.8%) | 84,738 (5.5%) | 12,358 (3.5%) | 20,490 (3.1%) | 9035 (13.8%) | |
| July | 150,450 (5.7%) | 100,051 (6.5%) | 11,041 (3.1%) | 38,451 (5.8%) | 907 (1.4%) | |
| August | 202,645 (7.7%) | 155,656 (10.1%) | 8114 (2.3%) | 37,071 (5.6%) | 1804 (2.8%) | |
| September | 304,628 (11.6%) | 223,622 (14.6%) | 8643 (2.4%) | 72,363 (10.9%) | 0 (0.0%) | |
| October | 230,242 (8.8%) | 119,862 (7.8%) | 15,294 (4.3%) | 82,614 (12.4%) | 12,472 (19.1%) | |
| November | 152,020 (5.8%) | 91,847 (6.0%) | 31,510 (8.8%) | 24,613 (3.7%) | 4050 (6.2%) | |
| December | 146,988 (5.6%) | 59,204 (3.9%) | 22,278 (6.2%) | 59,600 (9.0%) | 5906 (9.0%) | |
| Day of visit, n (%) | 0.736 | |||||
| Sunday | 358,751 (13.7%) | 170,502 (11.1%) | 105,668 (29.6%) | 82,124 (12.3%) | 457 (0.7%) | |
| Monday | 456,759 (17.4%) | 292,701 (19.1%) | 33,766 (9.5%) | 112,480 (16.9%) | 17,812 (27.2%) | |
| Tuesday | 363,415 (13.9%) | 177,228 (11.5%) | 41,706 (11.7%) | 119,747 (18.0%) | 24,734 (37.8%) | |
| Wednesday | 429,814 (16.4%) | 247,526 (16.1%) | 63,325 (17.8%) | 114,344 (17.2%) | 4619 (7.1%) | |
| Thursday | 361,836 (13.8%) | 235,130 (15.3%) | 38,329 (10.7%) | 81,332 (12.2%) | 7045 (10.8%) | |
| Friday | 381,795 (14.6%) | 249,840 (16.3%) | 59,331 (16.6%) | 67,820 (10.2%) | 4804 (7.3%) | |
| Saturday | 270,556 (10.3%) | 162,867 (10.6%) | 14,457 (4.1%) | 87,326 (13.1%) | 5906 (9.0%) | |
Abbreviations: MSA, metropolitan statistical area; SD, standard deviation; SMD, standardized mean difference.
a
All differences were statistically significant, SMD are shown.