Table 1

Demographic information of study cohort

All (n=6 104 245)Antibiotic users (n=5 551 441)
NPerson-years of follow-upNPerson-years of follow-up
Calendar period
 2000–20054 542 38622 441 1313 078 10613 931 515
 2005–20104 631 17922 862 0053 162 61514 447 974
 2010–20154 675 94923 101 8193 268 27714 800 199
 2015–20184 735 07918 707 3733 252 23011 385 193
Age group
 10–151 313 7106 189 509845 4093 164 596
 15–201 282 6835 979 831655 6753 073 213
 20–251 222 0165 599 619825 5893 615 661
 25–301 175 5765 527 708827 8783 561 745
 30–351 218 3405 941 889853 9893 920 376
 35–401 358 8686 679 422992 4294 496 614
 40–451 468 7387 056 9751 051 1884 545 956
 45–501 498 0087 074 4181 017 5554 340 187
 50–551 483 3646 954 578982 0404 232 652
 55–601 455 2856 728 295975 7584 193 637
 60–651 356 5756 172 838935 0543 953 960
 65–701 208 9215 371 316842 7493 464 737
 70–751 021 2654 317 341717 5392 821 087
 75–80779 2153 214 668555 4972 146 405
 80–85576 1312 260 838421 2501 554 431
 85–90372 5171 333 483281 263949 545
 ≥90189 304709 599
Sex
 Female3 079 01144 179 7692 868 14530 654 268
 Male3 025 23442 932 5592 683 29623 910 613
Area socioeconomic index
 Low2 123 43823 364 3431 863 81814 543 159
 Mid-low2 160 00721 401 7031 857 48813 319 462
 Mid-high2 050 20420 546 3911 774 80513 040 615
 High2 054 08921 799 8921 794 66513 661 644
Degree of urbanisation
 <50 people/km2 532 0345 680 746465 5363 596 654
 50–349 people/km2 3 845 98748 747 9513 438 82430 297 461
 350–999 people/km2 1 631 06816 282 9271 405 14510 200 141
 1000–1999 people/km2 343 9953 099 481294 0112 001 361
 ≥2000 people/km2 1 371 55213 301 2221 181 7658 469 264