Table 4. Numbers of participants who were recruited for and participated in the TMM CommCohort study from 2013–2015 (fiscal years).
| Recruiting results | ToMMo | IMM | Total |
| Type 1 survey (28 municipalities in ToMMo and 18 municipalities in IMM) | |||
| Numbers who were recruited including “briefing” (A) | 62,439 | 34,980 | 97,419 |
| Numbers who participated (B+C+D) | 40,433 | 26,922 | 67,355 |
| Numbers who were withdrawal of consent as of March 31, 2018 (excluding disposal of all samples and information) (B) | 636 | 248 | 884 |
| Numbers who did not return questionnaire (C) | 2,386 | 872 | 3,258 |
| Numbers who returned questionnaire (D) | 37,411 | 25,802 | 63,213 |
| Type 1 additional survey (5 municipalities in ToMMo) | |||
| Numbers who were recruited including “briefing” (E) | 664 | — | 664 |
| Numbers who participated (F+G+H) | 664 | — | 664 |
| Numbers who were withdrawal of consent as of March 31, 2018 (including disposal of all samples and information) (F) | 4 | — | 4 |
| Numbers who did not return questionnaire (G) | 3 | — | 3 |
| Numbers who returned questionnaire (H) | 657 | — | 657 |
| Type 2 surveys | |||
| Numbers who were recruited including “briefing” (I) | 13,855 | 5,991 | 19,846 |
| Numbers who participated (J+K+L) | 13,855 | 5,991 | 19,846 |
| Numbers who were withdrawal of consent as of March 31, 2018 (including disposal of all samples and information) (J) | 61 | 3 | 64 |
| Numbers who did not return questionnaire (K) | 12 | 1 | 13 |
| Numbers who returned questionnaire (L) | 13,782 | 5,987 | 19,769 |
| Detailed measurement | |||
| Numbers who participated in additional testing (I+M+N) | 17,822 | 9,379 | 27,201 |
| Numbers who recruited in Type 1 survey (M) | 3,833 | 3,388 | 7,221 |
| Numbers who recruited in Type 1 additional survey (N) | 134 | — | 134 |
| Numbers who participated in Type 2 surveys (I) | 13,855 | 5,991 | 19,846 |
| All recruitment survey methods | |||
| Numbers who were recruited including “briefing” (A+E+I) | 76,958 | 40,971 | 117,929 |
| Numbers who participated (B+C+D+F+G+H+J+K+L) | 54,952 | 32,913 | 87,865 |
| Numbers who were withdrawal of consent as of March 31, 2018 (including disposal of all samples and information) (B+F+J) | 701 | 251 | 952 |
| Numbers who did not return questionnaire (C+G+K) | 2,401 | 873 | 3,274 |
| Numbers who returned questionnaire (D+H+L) | 51,850 | 31,789 | 83,639 |
ToMMo, Miyagi Prefecture; IMM, Iwate Prefecture.