Table.
Characteristics of participants from unpublished and published studies
| Year* | Country | Number of participants | Number (%) of women | Mean age at baseline (years; SD) | Number (%) of participants with long working hours | Number of diabetes cases | Method of ascertainment | Mean follow-up (years; SD) | Person-years | Incidence per 10 000 person-years† | Socioeconomic status stratification‡ | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Unpublished studies | |||||||||||||
| ACL11 | 1986 | USA | 1493 | 787 (53%) | 44·5 (13·7) | 178 (12%) | 163 | Self-report | 12·6 (4·2) | 18 785 | 87† | Yes | |
| Alameda12 | 1973 | USA | 1461 | 484 (33%) | 44·1 (9·6) | 148 (10%) | 127 | Self-report | 25·5 (0·4) | 37 278 | 34† | Yes | |
| BCS197019 | 2004 | UK | 6447 | 3100 (48%) | 33·8 (1·8) | 369 (6%) | 51 | Self-report | 4·0 (0·2) | 25 483 | 20† | Yes | |
| BHPS17 | 1991 | UK | 15 238 | 7836 (51%) | 34·1 (11·1) | 1165 (8%) | 267 | Self-report | 6·4 (4·0) | 96 877 | 28† | Yes | |
| HILDA21 | 2005 | AUS | 4856 | 2322 (48%) | 41·4 (12·6) | 542 (11%) | 77 | Self-report | 4·0 (0·1) | 19 443 | 40† | Yes | |
| MIDUS14 | 1995 | USA | 2954 | 1540 (52%) | 44·9 (8·9) | 394 (13%) | 188 | Self-report | 8·9 (0·4) | 26 355 | 71† | Yes | |
| NCDS18 | 2000 | UK | 7678 | 3697 (48%) | 42·0 (0·0) | 594 (8%) | 207 | Self-report | 8·3 (0·4) | 63 555 | 33† | Yes | |
| NHANES-I13 | 1982 | USA | 4976 | 2835 (57%) | 48·9 (10·6) | 484 (10%) | 228 | Self-report | 9·1 (1·5) | 45 153 | 50† | Yes | |
| UndSoc20 | 2009 | UK | 10 969 | 6183 (56%) | 42·5 (12·5) | 559 (4%) | 259 | Self-report | 2·9 (0·3) | 31 809 | 81† | Yes | |
| WLSG15 | 1992 | USA | 5524 | 2907 (53%) | 54·1 (0·5) | 744 (13%) | 493 | Self-report | 11·2 (0·3) | 61 684 | 80† | Yes | |
| WLSS16 | 1993 | USA | 2569 | 1376 (54%) | 52·6 (7·0) | 355 (14%) | 222 | Self-report | 11·2 (0·5) | 28 900 | 77† | Yes | |
| FPS29 | 2000 | Finland | 43 600 | 35 128 (81%) | 44·5 (9·4) | 1387 (3%) | 1107 | Health register | 9·6 (1·1) | 418 093 | 26 | Yes | |
| HeSSup28 | 1998 | Finland | 15 931 | 8856 (56%) | 39·5 (10·2) | 1386 (9%) | 128 | Health register | 6·9 (0·4) | 110 670 | 12 | Yes | |
| Whitehall II23 | 1985 | UK | 7263 | 2197 (30%) | 49·0 (5·8) | 726 (10%) | 579 | Blood test | 12·6 (3·3) | 91 670 | 63 | Yes | |
| WOLF N25 | 1996 | Sweden | 4576 | 759 (17%) | 43·9 (10·3) | 52 (1%) | 49 | Blood test | 11·6 (1·2) | 52 967 | 9 | Yes | |
| WOLF S24 | 1992 | Sweden | 5497 | 2372 (43%) | 41·4 (11·0) | 227 (4%) | 80 | Blood test | 14·4 (1·9) | 79 425 | 10 | Yes | |
| COPSOQ-I26 | 1997 | Denmark | 1798 | 870 (48%) | 40·6 (10·6) | 109 (6%) | 47 | Health register | 12·6 (2·0) | 22 621 | 21 | Yes | |
| COPSOQ-II27 | 1998 | Denmark | 3320 | 1747 (53%) | 42·6 (10·2) | 175 (5%) | 21 | Health register | 5·9 (0·6) | 19 709 | 11 | Yes | |
| DWECS30 | 2000 | Denmark | 5505 | 2573 (47%) | 41·8 (11·0) | 439 (8%) | 68 | Health register | 9·8 (1·4) | 53 693 | 13 | Yes | |
| Published studies | |||||||||||||
| Kawakami6 | 1999 | Japan | 2194 | 0 | 37·1§ | 351 (16%) | 34 | Blood test | 8·0§ | 17 451 | 19 | No | |
| Nakanishi7 | 2001 | Japan | 1266 | 0 | 46·7§ | 174 (14%) | 54 | Blood test | 5·0§ | 6330 | 85 | No | |
| Kroenke8 | 2007 | USA | 62 574 | 62 574 (100%) | 38·8§ | 1482 (2%) | 365 | Self report | 5·6§ | 351 363 | 10 | No | |
| Eriksson9 | 2013 | Sweden | 4431 | 2707 (61%) | 46·7§ | 2997 (68%) | 149 | Blood test | 10·1§ | 44 865 | 33 | No | |
| Total | 222 120 | 153 067 (69%) | 43·3§ | 15 047 (7%) | 4963 | 7·6§ | 1 724 179 | 28·8 | |||||
*
Baseline year for unpublished studies and publication year for published studies.
†
Incidence calculated by use of total follow-up (incidence dates were not available); in the other studies, each participant was followed up from the date of their baseline assessment to the earliest incident of diabetes, death, or the end of follow-up.
‡
Included in socioeconomic-status-stratified analyses.
§
SD was not available for the published studies.