Research Article
Traditional Chinese Medicine Is Associated with Reduced Risk of Readmission in Rheumatoid Arthritis Patients with Anemia: A Retrospective Cohort Study
Table 1
Comparison of demographic characteristics between RA patients with and without anemia.
| | Characteristic | Before PSM matched | value | After PSM matched | value | | Total (n = 811) | RA with anemia (n = 471) | RA without anemia (n = 340) | Total (n = 656) | RA with anemia (n = 328) | RA without anemia (n = 328) |
| | Age (years), n (%) | | | | | | | | | | 20–60 | 470 (57.95) | 261 (55.41) | 209 (61.47) | 0.09 | 384 (58.54) | 185 (56.40) | 199 (60.67) | 0.27 | | >60 | 341 (42.05) | 210 (44.59) | 131 (38.53) | | 272 (41.46) | 143 (43.60) | 129 (39.33) | | | Median (IQR) | 56 (49, 66) | 56 (49, 67) | 56 (49, 65) | 0.29 | 56 (49, 66) | 56 (48, 67) | 56 (49, 65) | 0.79 |
| | Gender, n (%) | | | | | | | | | | Female | 673 (82.98) | 392 (83.23) | 281 (82.65) | 0.83 | 539 (82.16) | 270 (82.32) | 269 (82.01) | 0.92 | | Male | 138 (17.02) | 79 (16.77) | 59 (17.35) | | 117 (17.84) | 58 (17.68) | 59 (17.99) | |
| | Combined diseases, n (%) | | | | | | | | | | Hypertension | 176 (21.70) | 116 (24.63) | 60 (17.65) | 0.02 | 129 (19.66) | 69 (21.04) | 60 (18.29) | 0.38 | | Diabetes | 34 (4.19) | 21 (4.46) | 13 (3.82) | 0.66 | 25 (3.81) | 13 (3.96) | 12 (3.66) | 0.84 | | Hyperlipidemia | 91 (11.22) | 41 (8.70) | 50 (14.71) | 0.01 | 76 (11.59) | 37 (11.28) | 39 (11.89) | 0.81 |
| | Basic medicine, n (%) | | | | | | | | | | DMARDs | 767 (94.57) | 448 (95.12) | 319 (93.82) | 0.42 | 617 (94.05) | 309 (94.21) | 308 (93.90) | 0.87 | | NSAIDs | 424 (52.28) | 253 (53.72) | 171 (50.29) | 0.34 | 328 (50.00) | 158 (48.17) | 170 (51.83) | 0.35 | | Glucocorticoids | 202 (24.91) | 118 (25.05) | 84 (24.71) | 0.91 | 174 (26.52) | 90 (27.44) | 84 (25.61) | 0.60 | | Folic acid | 241 (29.72) | 160 (33.97) | 81 (23.82) | <0.01 | 148 (22.56) | 67 (20.43) | 81 (24.70) | 0.19 |
| | End point events, n (%) | | | | | | | | | | Readmission | 107 (13.19) | 75 (15.92) | 32 (9.41) | 0.01 | 87 (13.26) | 59 (17.99) | 28 (8.54) | <0.01 | | Interstitial lung disease | 94 (11.59) | 66 (14.01) | 28 (8.24) | 0.01 | 78 (11.89) | 50 (15.24) | 28 (8.54) | 0.01 | | Sjogren’s syndrome | 80 (10.11) | 55 (11.68) | 25 (7.35) | 0.04 | 56 (8.54) | 32 (9.76) | 24 (7.32) | 0.26 | | Surgical treatment | 60 (7.40) | 46 (9.77) | 14 (4.12) | <0.01 | 45 (6.86) | 31 (9.45) | 14 (4.27) | 0.01 | | Death | 21 (2.59) | 15 (3.18) | 6 (1.76) | 0.21 | 15 (2.29) | 9 (2.74) | 6 (1.83) | 0.43 |
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Note. PSM: propensity score matching; DMARDs: disease-modifying antirheumatic drugs; NSAIDs: nonsteroidal anti-inflammatory drugs.
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