Interval in Days Between Screening Mammograms (1996-2007) Performed 9 to 17 Months Apart

Day Number of
Mammograms
270 151
271 171
272 210
273 330
274 228
275 183
276 170
277 182
278 170
279 250
280 390
281 307
282 245
283 208
284 229
285 244
286 299
287 463
288 414
289 293
290 233
291 249
292 262
293 395
294 556
295 435
296 340
297 312
298 307
299 365
300 467
301 707
302 541
303 425
304 400
305 367
306 478
307 575
308 937
309 656
310 522
311 493
312 463
313 549
314 745
315 1,116
316 821
317 636
318 605
319 631
320 693
321 946
322 1,510
323 1,057
324 888
325 829
326 898
327 940
328 1,318
329 2,019
330 1,371
331 1,205
332 1,158
333 1,126
334 1,276
335 1,866
336 3,067
337 2,141
338 1,789
339 1,759
340 1,791
341 2,076
342 2,831
343 4,704
344 3,392
345 2,835
346 2,539
347 2,771
348 3,243
349 4,460
350 7,447
351 4,980
352 4,072
353 3,853
354 4,052
355 4,823
356 6,603
357 11,108
358 7,605
359 5,936
360 5,928
361 6,241
362 7,842
363 11,446
364 24,172
365 42,234
366 97,576
367 88,111
368 76,155
369 63,561
370 58,031
371 81,327
372 40,839
373 26,567
374 22,714
375 21,880
376 23,524
377 29,011
378 45,427
379 27,383
380 19,712
381 17,201
382 17,096
383 18,536
384 23,652
385 35,546
386 22,999
387 16,572
388 14,444
389 14,252
390 15,605
391 20,272
392 31,256
393 19,805
394 14,285
395 12,362
396 12,570
397 13,695
398 17,503
399 26,666
400 16,828
401 12,303
402 10,693
403 10,506
404 11,664
405 14,977
406 22,716
407 14,908
408 10,590
409 9,233
410 9,197
411 10,011
412 13,132
413 19,314
414 12,703
415 9,299
416 8,155
417 8,123
418 8,705
419 11,643
420 17,412
421 11,067
422 8,065
423 7,277
424 7,159
425 7,945
426 10,301
427 15,611
428 9,982
429 7,536
430 6,571
431 6,433
432 7,063
433 8,961
434 13,502
435 8,683
436 6,473
437 5,582
438 5,734
439 6,280
440 8,205
441 11,900
442 7,966
443 5,817
444 5,129
445 5,202
446 5,585
447 7,284
448 10,795
449 7,366
450 5,333
451 4,727
452 4,722
453 5,118
454 6,555
455 9,926
456 6,660
457 4,931
458 4,224
459 4,288
460 4,709
461 6,163
462 9,288
463 6,035
464 4,392
465 4,073
466 3,898
467 4,291
468 5,711
469 8,148
470 5,438
471 4,155
472 3,652
473 3,674
474 4,019
475 5,146
476 7,652
477 5,010
478 3,807
479 3,411
480 3,389
481 3,683
482 4,781
483 7,195
484 4,877
485 3,539
486 3,139
487 3,180
488 3,447
489 4,423
490 6,773
491 4,476
492 3,421
493 2,978
494 2,988
495 3,263
496 4,241
497 6,137
498 4,127
499 3,090
500 2,740
501 2,703
502 3,021
503 3,845
504 5,890
505 3,941
506 2,830
507 2,619
508 2,622
509 2,825
510 3,618
511 5,538
512 3,690
513 2,645
514 2,463
515 2,437
516 2,716
517 3,539
518 5,102
519 3,501
520 2,588
521 2,409
522 2,406
523 2,555
524 3,324
525 4,904
526 3,289
527 2,449
528 2,219
529 2,253
530 2,430
531 3,210
532 4,587
533 3,134
534 2,308
535 2,091
536 2,154
537 2,366
538 2,959
539 4,417
540 3,047

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