Table 2.
Demographic Data
| Open (n = 170 276) | Laparoscopy (n = 87 209) | P Value | |
|---|---|---|---|
| Agea (mean ± SE) (y) | 74.09 ± 0.04 | 73.16 ± 0.05 | < .001b |
| Sex (male/female)b | 48.3%/51.7% | 48.1%/51.9% | .6604 |
| Racec | < .001d | ||
| White | 105 428.3 (61.9%) | 56 730.3 (65.1%) | |
| African American | 7403.1 (4.3%) | 2662.6 (3.1%) | |
| Other | 57 444.3 (33.7%) | 27 816.4 (31.9%) | |
| Charlson index | < .001d | ||
| 0–2 | 138 916.3 (81.6%) | 78 054.8 (89.5%) | |
| ≥3 | 31 359.4 (18.4%) | 9154.5 (10.5%) | |
| Ruptured appendix/abscess of appendix | 79 574.6 (46.7%) | 33 750.4 (38.7%) | < .001d |
| Income (by ZIP code) | .3729 | ||
| <$45 000 | 118 978.2 (69.9%) | 61 608.7 (70.6%) | |
| ≥$45 000 | 51 297.5 (30.1%) | 25 600.6 (29.4%) | |
| Insurance | .0054d | ||
| Private | 18 640.4 (10.9%) | 10 575.1 (12.1%) | |
| Medicare | 146 593.7 (86.1%) | 74 204.7 (85.1%) | |
| Medicaid | 2090.1 (1.2%) | 902.0 (1.0%) | |
| Other | 2951.6 (1.7%) | 1527.6 (1.8%) | |
| Hospital type | .0890 | ||
| Nonteaching | 104 545.5 (61.5%) | 55 376.5 (63.7%) | |
| Teaching | 65 392.2 (38.5%) | 31 601.4 (36.3%) | |
| Hospital location | < .001d | ||
| Rural | 32 879.3 (19.3%) | 14 029.4 (16.1%) | |
| Urban | 137 058.3 (80.7%) | 72 948.5 (83.9%) |
a
P value by independent t test.
b
P value by Fisher exact test.
c
P value by χ2 test.
d
Significant by 2-tailed test.