Table 1 Demographic characteristics of different types of ILD
Characteristics | Total, n = 5009(%) | IPF, n = 510 (%) | NSIP, n = 407, (%) | CTD-ILD, n = 1576 (%) | COP, n = 534 (%) | HP, n = 250 (%) | ANCA-AV-ILD, n = 63 (%) | Others, n = 1669 (%) |
|---|---|---|---|---|---|---|---|---|
Age, Median (IQR) years | 62(53–70) | 67(61–72) | 61(53–69) | 59(50–67) | 60(51–68) | 58(47–66) | 68(59–75) | 64(54–72) |
  < 60 | 2138(42.7) | 103(20.2) | 181(44.5) | 801(50.8) | 262(49.1) | 131(52.4) | 16(25.4) | 644(38.6) |
 60–69 | 1573(31.4) | 209(41.0) | 132(32.4) | 486(30.8) | 162(30.3) | 81(32.4) | 20(31.7) | 483(28.9) |
 70–79 | 984(19.6) | 159(31.2) | 80(19.7) | 240(15.2) | 88(16.5) | 36(14.4) | 19(30.2) | 362(21.7) |
  ≥ 80 | 314(6.3) | 39(7.6) | 14(3.4) | 49(3.1) | 22(4.1) | 2(0.8) | 8(12.7) | 180(10.8) |
Male | 2585(51.6) | 426(83.5) | 204(50.1) | 493(31.3) | 274(51.3) | 112(44.8) | 35(55.6) | 1041(62.4) |
Predisposing factors | ||||||||
 Strong risk factors | ||||||||
  Myocardial infarction | 82(1.6) | 14(2.7) | 7(1.7) | 11(0.7) | 5(0.9) | 6(2.4) | 1(1.6) | 38(2.3) |
  Atrial fibrillation | 98(2.0) | 7(1.4) | 13(3.2) | 12(0.8) | 13(2.4) | 2(0.8) | 1(1.6) | 50(3.0) |
  Trauma/surgery | 47(0.9) | 2(0.4) | 2(0.5) | 22(1.4) | 5(0.9) | 0(0) | 1(1.6) | 15(0.9) |
Moderate risk factors | ||||||||
 Autoimmune diseases | 1532(30.6) | 3(0.6) | 4(1.0) | 1576(100.0) | 4(0.7) | 1(0.4) | 0(0) | 13(0.8) |
 Respiratory failure | 623(12.4) | 88(17.3) | 29(7.1) | 152(9.6) | 46(8.6) | 22(8.8) | 3(4.8) | 283(17.0) |
Lung infection | 1205(24.1) | 126(24.7) | 75(18.4) | 393(24.9) | 145(27.2) | 38(15.2) | 20(31.7) | 408(24.4) |
 Urinary tract infections | 51(1.0) | 4(0.8) | 4(1.0) | 22(1.4) | 7(1.3) | 2(0.8) | 0(0) | 12(0.7) |
 Inflammatory bowel disease | 22(0.3) | 0(0) | 1(0.2) | 6(0.4) | 3(0.6) | 1(0.4) | 0(0) | 11(0.7) |
 Malignancies | 253(5.1) | 26(5.1) | 18(4.4) | 40(2.5) | 39(7.3) | 6(2.4) | 2(3.2) | 122(7.3) |
Week risk factors | ||||||||
 Diabetes | 806(16.1) | 118(23.1) | 62(15.2) | 214(13.6) | 98(18.4) | 31(12.4) | 10(15.9) | 273(16.4) |
 Hypertension | 1236(24.7) | 122(23.9) | 101(24.8) | 315(20.0) | 140(26.2) | 66(26.4) | 11(17.5) | 481(28.8) |
 Varicose veins | 35(0.7) | 2(0.4) | 0(0) | 11(0.7) | 5(0.9) | 1(0.4) | 0(0) | 16(1.0) |