Table 3.
Completion characteristics of EARTH Study Follow-up, 2007
| Region |
||||
|---|---|---|---|---|
| Total (N=3368) N (%) |
Southcentral (N=1156) N (%) |
Southeast (N=780) N (%) |
Southwest (N=1432) N (%) |
|
|
| ||||
| Method of Completion (% of respondents) | ||||
| Call to personal telephone numbers | 2028 (60) | 567 (49) | 504 (65) | 957 (67) |
| Call to personal contacts or extended community networks | 807 (24) | 320 (28) | 168 (22) | 319 (22) |
| Participant returned electronic mail, US mail, or telephone call | 469 (14) | 269 (23) | 91 (12) | 109 (8) |
| Local interviewer | 64 (2) | -- | 17 (2) | 47 (3) |
|
| ||||
| Completion Data | ||||
| Interviews completed outside of normal business hours/days (% of respondents) | 259 (8) | 82 (7) | 63 (8) | 114 (8) |
| Average minutes spent per respondent, mean (SD) | 22.5 (14) | 22.2 (13) | 26.7 (17) | 20.5 (12) |
| Average minutes spent per non-respondent, mean (SD) | 35.6 (21) | 31.8 (18) | 47.6 (23) | 32.3 (18) |
| Number of tries required to complete interview, mean (SD) | 4.95 (4) | 4.92 (4) | 6.10 (5) | 4.33 (4) |
|
| ||||
| Number of tries required to complete interview (% of respondents) | ||||
| 1–3 | 1647 (49) | 560 (48) | 305 (39) | 782 (55) |
| 4–6 | 860 (26) | 302 (26) | 211 (27) | 347 (24) |
| 7+ | 861 (26) | 294 (25) | 264 (34) | 303 (21) |
|
| ||||
| Reasons for non-completion (% of original cohort) | ||||
| Deceased | 28 (0.7) | |||
| Declined to participate | 24 (0.6) | |||
| Lost to follow-up† | 166 (4.3) | |||
| Unable to complete follow-up | 121(3.2) | |||
| Incarcerated | 20 (0.5) | |||
| Military service | 6 (0.2) | |||
| Shelter | 36 (0.9) | |||
| Other | 59 (1.5) | |||
| Total Non-completion | 460 (12.0) | |||
Note.
†
Lost to follow-up was defined as all possible sources of contact information exhausted and nothing known further about participant whereabouts.