Table 1.
Comparison of demographics and health characteristics between patients with IBD and controls
| Parameters | Bivariate comparisons – unweighted | Bivariate comparisons – weighted | |||||
|---|---|---|---|---|---|---|---|
| IBD n=441 | Control n=82,944 | P-value | IBD n=441 | Control n=428 | P-value | ||
| Age (mean ± SD/SE) | Years | 48.2±14.8 | 47.5±15.6 | 0.351 | 48.2±0.7 | 48.6±0.2 | <0.001 |
| Sex (count [%]) | Male | 272 (61.7%) | 41,930 (50.6%) | <0.001 | 272 (61.7%) | 257 (60.0%) | 0.481 |
| Currently employed (count [%]) | Yes | 292 (66.2%) | 50,259 (60.6%) | 0.016 | 292 (66.2%) | 278 (65.1%) | 0.618 |
| University education (count [%]) | Less than university education | 224 (50.8%) | 42,955 (51.8%) | 0.677 | 224 (50.8%) | 217 (50.8%) | 0.998 |
| Annual household income (count [%]) | <¥3 million | 58 (13.2%) | 15,204 (18.3%) | 0.008 | 58 (13.2%) | 59 (13.8%) | 0.906 |
| ¥3 million to <¥5 million | 126 (28.6%) | 21,199 (25.6%) | 126 (28.6%) | 123 (28.7%) | |||
| ¥5 million to <¥8 million | 123 (27.9%) | 20,720 (25.0%) | 123 (27.9%) | 122 (28.6%) | |||
| ≥¥8 million | 99 (22.4%) | 16,870 (20.3%) | 99 (22.4%) | 88 (20.5%) | |||
| Decline to answer | 35 (7.9%) | 8,951 (10.8%) | 35 (7.9%) | 36 (8.4%) | |||
| Type of insurance (count [%]) | National Health Insurance | 199 (45.1%) | 37,078 (44.7%) | 0.050 | 199 (45.1%) | 190 (44.4%) | 0.987 |
| Social Insurance | 222 (50.3%) | 40,847 (49.2%) | 222 (50.3%) | 220 (51.5%) | |||
| Late-Stage Elderly Insurance | 7 (1.6%) | 911 (1.1%) | 7 (1.6%) | 7 (1.5%) | |||
| Other | 9 (2.0%) | 1,324 (1.6%) | 9 (2.0%) | 8 (1.8%) | |||
| None of the above | 4 (0.9%) | 2,784 (3.4%) | 4 (0.9%) | 3 (0.8%) | |||
| BMI category (count [%]) | Underweight | 59 (13.4%) | 9,122 (11.0%) | 0.176 | 59 (13.4%) | 55 (12.8%) | 0.988 |
| Acceptable risk | 228 (51.7%) | 42,108 (50.8%) | 228 (51.7%) | 219 (51.2%) | |||
| Increased risk | 115 (26.1%) | 22,339 (26.9%) | 115 (26.1%) | 114 (26.7%) | |||
| High risk | 28 (6.3%) | 5,709 (6.9%) | 28 (6.3%) | 29 (6.7%) | |||
| Decline to provide weight | 11 (2.5%) | 3,666 (4.4%) | 11 (2.5%) | 11 (2.7%) | |||
| Alcohol use (count [%]) | Drink alcohol | 298 (67.6%) | 57,672 (69.5%) | 0.373 | 298 (67.6%) | 288 (67.4%) | 0.950 |
| Smoking behavior (count [%]) | Never smoked | 213 (48.3%) | 46,436 (56.0%) | 0.004 | 213 (48.3%) | 213 (49.8%) | 0.783 |
| Former smoker | 117 (26.5%) | 19,676 (23.7%) | 117 (26.5%) | 113 (26.4%) | |||
| Current smoker | 111 (25.2%) | 16,832 (20.3%) | 111 (25.2%) | 102 (23.9%) | |||
| Exercise behavior (count [%]) | Do not exercise | 237 (53.7%) | 47,919 (57.8%) | 0.087 | 237 (53.7%) | 238 (55.7%) | 0.415 |
| CCI (mean±SD/SE) | 1.29±4.83 | 0.14±0.46 | <0.001 | 1.29±0.23 | 0.51±0.04 | <0.001 | |
Notes: SDs and SEs are provided for the unweighted and weighted comparisons, respectively.
Abbreviations: BMI, body mass index; CCI, Charlson Comorbidity Index; IBD, inflammatory bowel disease; SE, standard error.