Table 6. Chlamydia — Reported Cases and Rates of Reported Cases by Age Group and Sex, United States, 2018–2022

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Table 6. Chlamydia — Reported Cases and Rates of Reported Cases by Age Group and Sex, United States, 2018–2022
Year Age Group Cases Rates per 100,000 Population*
Total Male Female Unknown Sex Total Male Female
2018 0-4 496 186 300 10 2.5 1.8 3.1
5-9 144 19 125 0 0.7 0.2 1.3
10-14 10,905 1,438 9,450 17 52.2 13.5 92.5
15-19 446,008 103,582 341,635 791 2,114.1 961.3 3,309.7
20-24 641,269 202,528 437,732 1,009 2,931.7 1,808.0 4,101.7
25-29 333,561 135,059 197,966 536 1,415.7 1,123.7 1,715.0
30-34 154,132 72,222 81,645 265 696.3 645.3 746.0
35-39 78,094 39,320 38,635 139 362.2 364.4 358.6
40-44 38,657 21,111 17,462 84 196.1 215.5 176.1
45-54 38,323 24,067 14,173 83 92.1 117.2 67.2
55-64 12,536 8,474 4,029 33 29.7 41.5 18.4
65+ 2,331 1,676 640 15 4.4 7.2 2.2
Unknown Age 2,212 765 1,271 176
TOTAL 1,758,668 610,447 1,145,063 3,158 537.5 378.9 689.6
2019 0-4 523 201 320 2 2.7 2.0 3.3
5-9 182 32 146 4 0.9 0.3 1.5
10-14 11,561 1,432 10,094 35 55.6 13.5 99.2
15-19 453,927 108,724 344,130 1,073 2,156.0 1,011.8 3,338.2
20-24 649,450 209,635 438,567 1,248 3,002.1 1,894.6 4,149.9
25-29 340,542 140,281 199,581 680 1,448.6 1,168.6 1,734.8
30-34 163,671 78,579 84,726 366 729.7 692.0 764.9
35-39 84,687 43,605 40,897 185 389.6 400.6 376.8
40-44 43,005 23,715 19,185 105 215.9 239.4 191.6
45-54 40,480 25,150 15,256 74 99.0 124.7 73.7
55-64 13,984 9,567 4,378 39 32.9 46.7 19.9
65+ 2,783 2,036 736 11 5.1 8.5 2.5
Unknown Age 3,908 1,380 2,454 74
TOTAL 1,808,703 644,337 1,160,470 3,896 551.0 398.6 696.6
2020 0-4 559 216 328 15 2.9 2.2 3.5
5-9 197 39 155 3 1.0 0.4 1.6
10-14 9,922 1,201 8,692 29 45.6 10.8 81.9
15-19 386,550 90,944 294,624 982 1,794.0 825.9 2,796.4
20-24 575,556 180,060 394,149 1,347 2,680.9 1,644.8 3,746.2
25-29 297,451 118,636 178,085 730 1,299.3 1,020.9 1,579.8
30-34 148,819 69,456 79,015 348 652.0 601.4 700.9
35-39 73,333 37,085 36,068 180 330.2 330.7 328.0
40-44 37,115 20,139 16,875 101 180.5 195.3 164.6
45-54 32,381 19,930 12,352 99 78.6 96.8 59.9
55-64 11,600 7,941 3,629 30 26.9 37.6 16.5
65+ 2,174 1,549 602 23 4.0 6.4 2.0
Unknown Age 4,228 1,480 2,487 261
TOTAL 1,579,885 548,676 1,027,061 4,148 476.7 334.2 614.1
2021 0-4 463 178 280 5 2.5 1.8 3.0
5-9 163 19 141 3 0.8 0.2 1.4
10-14 10,012 1,288 8,692 32 46.7 11.7 83.1
15-19 375,884 90,720 284,306 858 1,743.1 823.0 2,697.0
20-24 586,315 184,350 400,702 1,263 2,724.0 1,680.0 3,797.8
25-29 308,559 123,735 184,151 673 1,378.0 1,087.4 1,672.1
30-34 168,421 80,320 87,753 348 729.0 688.0 767.9
35-39 84,257 43,388 40,684 185 377.8 385.2 368.7
40-44 44,313 24,546 19,674 93 210.0 231.7 187.2
45-54 38,435 23,338 15,012 85 94.5 114.9 73.7
55-64 14,249 9,838 4,387 24 33.3 46.9 20.1
65+ 2,780 1,998 768 14 5.0 7.9 2.5
Unknown Age 10,565 3,755 6,696 114
TOTAL 1,644,416 587,473 1,053,246 3,697 495.5 357.4 628.8
2022 0-4 529 198 315 16 2.9 2.1 3.5
5-9 167 42 125 0 0.8 0.4 1.3
10-14 10,442 1,478 8,923 41 50.0 13.8 87.6
15-19 376,345 95,187 279,919 1,239 1,739.5 858.9 2,652.3
20-24 576,253 182,289 392,214 1,750 2,537.9 1,571.2 3,532.3
25-29 305,857 122,749 182,244 864 1,378.2 1,081.2 1,681.2
30-34 175,859 84,562 90,859 438 754.5 714.4 792.1
35-39 90,159 47,220 42,700 239 404.9 417.8 389.4
40-44 48,692 27,048 21,532 112 227.2 250.0 202.9
45-54 41,920 25,286 16,532 102 103.7 124.7 82.0
55-64 16,204 11,285 4,878 41 38.5 54.6 22.8
65+ 3,572 2,584 974 14 6.2 10.0 3.1
Unknown Age 3,717 1,277 2,358 82
TOTAL 1,649,716 601,205 1,043,573 4,938 495.0 363.7 621.2
* No population data are available for unknown sex and age; therefore, rates are not calculated.
NOTE: Cases in the 0–4 age group may include cases due to perinatal transmission. See Technical Notes for more information on chlamydia case reporting. This report includes data from years that coincide with the COVID-19 pandemic, which introduced uncertainty and difficulty in interpreting case data. See Impact of COVID-19 on STIs for more information.

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