Table 4. Chlamydia — Reported Cases and Rates of Reported Cases by Age Group and Sex, United States, 2016-2020

Table 4. Chlamydia — Reported Cases and Rates of Reported Cases by Age Group and Sex, United States, 2016-2020
Year Age Group
Cases
Rates per 100,000 Population*
Total Male Female Unknown Sex Total Male Female
2016 0-4 597 225 368 4 3.0 2.2 3.8
5-9 188 25 161 2 0.9 0.2 1.6
10-14 10,571 1,341 9,206 24 51.3 12.7 91.2
15-19 407,230 89,899 316,639 692 1927.3 832.3 3065.8
20-24 601,173 181,857 418,388 928 2686.1 1582.6 3842.0
25-29 298,176 114,484 183,222 470 1302.6 984.3 1627.3
30-34 133,062 58,583 74,226 253 610.8 534.1 686.1
35-39 66,669 31,671 34,872 126 320.9 305.2 335.4
40-44 32,548 16,784 15,705 59 165.2 171.7 158.3
45-54 32,316 19,569 12,683 64 75.5 92.7 58.5
55-64 9,321 5,942 3,354 25 22.5 29.7 15.6
65+ 1,772 1,161 597 14 3.6 5.3 2.2
Unknown Age 4,731 1,329 3,298 104
TOTAL 1,598,354 522,870 1,072,719 2,765 494.7 328.7 653.9
2017 0-4 514 188 323 3 2.6 1.8 3.3
5-9 167 9 158 0 0.8 0.1 1.6
10-14 10,726 1,252 9,454 20 51.6 11.8 92.9
15-19 437,904 99,864 337,290 750 2072.3 924.6 3264.8
20-24 631,207 195,971 434,050 1,186 2853.7 1726.7 4030.4
25-29 321,857 127,007 194,267 583 1377.2 1067.1 1694.0
30-34 144,451 65,690 78,502 259 657.4 592.4 721.3
35-39 74,202 36,427 37,621 154 349.5 343.1 354.4
40-44 36,332 19,310 16,940 82 185.0 198.0 171.3
45-54 36,229 22,431 13,713 85 85.5 107.3 63.9
55-64 11,356 7,490 3,840 26 27.0 37.0 17.7
65+ 2,178 1,461 698 19 4.3 6.5 2.5
Unknown Age 1,446 544 795 107
TOTAL 1,708,569 577,644 1,127,651 3,274 524.6 360.1 682.1
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 2114.1 961.3 3309.7
20-24 641,269 202,528 437,732 1,009 2931.7 1808.0 4101.7
25-29 333,561 135,059 197,966 536 1415.7 1123.7 1715.0
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 2156.0 1011.8 3338.2
20-24 649,450 209,635 438,567 1,248 3002.1 1894.6 4149.9
25-29 340,542 140,281 199,581 680 1448.6 1168.6 1734.8
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 3.4
5-9 197 39 155 3 1.0 0.4 1.6
10-14 9,922 1,201 8,692 29 47.7 11.3 85.4
15-19 386,550 90,944 294,624 982 1835.9 846.3 2857.9
20-24 575,556 180,060 394,149 1,347 2660.6 1627.3 3729.6
25-29 297,451 118,636 178,085 730 1265.3 988.3 1548.0
30-34 148,819 69,456 79,015 348 663.4 611.7 713.3
35-39 73,333 37,085 36,068 180 337.4 340.7 332.3
40-44 37,115 20,139 16,875 101 186.3 203.3 168.5
45-54 32,381 19,930 12,352 99 79.2 98.8 59.7
55-64 11,600 7,941 3,629 30 27.3 38.7 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 4,148 481.3 339.4 616.5
* 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. The COVID-19 pandemic has introduced uncertainty and difficulty in interpreting 2020 case data. See Impact of COVID-19 on STDs for more information.

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