Table 2.
Overview of demographic parameters from NHANES database before/after PSM analyses
| Before PSM | After PSM | |||||
|---|---|---|---|---|---|---|
|
|
|
|||||
| With cholecystectomy | Without cholecystectomy | P | With cholecystectomy | Without cholecystectomy | P | |
| (n = 234) | (n = 1487) | (n = 234) | (n = 468) | |||
| Age (> 60, (%)) | 129 (55.1) | 575 (38.7) | < 0.001* | 129 (55.1) | 244 (52.1) | 0.504 |
| Sex (Female, (%)) | 178 (76.1) | 737 (49.6) | < 0.001* | 178 (76.1) | 365 (78.0) | 0.633 |
| Education level (%) | 0.058 | 0.418 | ||||
| < 9th grade | 20 (8.5) | 105 (7.1) | 20 (8.5) | 40 (8.5) | ||
| 9-11th grade | 29 (12.4) | 155 (10.4) | 29 (12.4) | 50 (10.7) | ||
| High school | 64 (27.4) | 329 (22.1) | 64 (27.4) | 103 (22.0) | ||
| Some college or AA degree | 79 (33.8) | 492 (33.1) | 79 (33.8) | 172 (36.8) | ||
| College graduate or above | 42 (17.9) | 405 (27.2) | 42 (17.9) | 103 (22.0) | ||
| Don’t Know | 0 (0.0) | 1 (0.1) | / | / | ||
| BMI (mean (SD)) | 33.2 (8.2) | 29.6 (7.2) | < 0.001* | 33.2 (8.2) | 32.7 (8.8) | 0.406 |
| Hypertension (%) | 134 (57.3) | 618 (41.6) | < 0.001* | 134 (57.3) | 231 (49.4) | 0.058 |
| Diabetes mellitus (%) | 76 (32.5) | 271 (18.2) | < 0.001* | 76 (32.5) | 139 (29.7) | 0.506 |
| Lipid-regulating agents (%) | 107 (45.7) | 566 (38.1) | 0.031* | 107 (45.7) | 201 (42.9) | 0.536 |
| TC (mg/dL, median [IQR]) | 177.0 [152.2, 207.5] | 184.0 [160.0, 215.0] | 0.020* | 177.0 [152.3, 207.5] | 184.0 [161.0, 217.0] | 0.021* |
| LDL-C (mg/dL, median [IQR]) | 101.0 [78.0, 127.8] | 109.0 [87.0, 135.0] | 0.006* | 101.0 [78.0, 127.8] | 108.0 [86.8, 136.0] | 0.036* |
| HDL-C (mg/dL, median [IQR]) | 50.0 [42.0, 61.0] | 52.0 [43.0, 63.0] | 0.212 | 50.0 [42.0, 61.0] | 53.0 [44.0, 65.0] | 0.017* |
| TG (mg/dL, median [IQR]) | 129.0 [91.0, 167.8] | 110.0 [78.0, 155.0] | < 0.001* | 129.0 [91.0, 167.8] | 114.0 [84.0, 158.0] | 0.021* |
| Fasting glucose (mg/dL, median [IQR]) | 110.0 [100.0, 129.0] | 105.0 [97.0, 117.0] | < 0.001* | 110.0 [100.0, 129.0] | 107.0 [97.8, 127.0] | 0.061 |
| Fasting insulin (uU/dL, median [IQR]) | 12.8 [8.8, 20.4] | 9.7 [6.1, 15.8] | < 0.001* | 12.8 [8.8, 20.4] | 11.7 [7.3, 20.2] | 0.071 |
| HbA1c (%, median [IQR]) | 5.8 [5.4, 6.4] | 5.6 [5.3, 6.0] | < 0.001* | 5.8 [5.4, 6.4] | 5.8 [5.4, 6.5] | 0.860 |
*
P < 0.05.
Abbreviations: BMI, body mass index; TC, total cholesterol; LDL-C, low-density lipoprotein cholesterol; HDL-C, high-density lipoprotein cholesterol; TG, triglyceride; HbA1c, hemoglobin A1c; IQR, interquartile range.