Main characteristics of cohort studies evaluating the association between blood transfusions and non-Hodgkin lymphoma
| Author . | Year . | Country . | Source of cohort . | NHL assessment . | RBC transfusion assessment . | Mean follow-up . | Total cohort (total person-years) . | Cases observed (cases expected) . | Source of expected cases . | Adjustments . |
|---|---|---|---|---|---|---|---|---|---|---|
| Blomberg14 | 1993 | Sweden | Blood Centre Registry, Lund University Hospital | Regional tumor registry | Blood Centre Registry, Lund University Hospital | 10 y (1981-1991) | 1572 (8249) | 7 (1.7) | Malmohus County Council Registry | Age |
| Memon18 | 1994 | United Kingdom | 41 major hospitals and blood centers in England, Wales, and Scotland | National Health Service Central Registry | 41 major hospitals and blood centers in England, Wales, and Scotland | 25 y (1942-1990) | 12 690 (340 227) | 4 (1.85) | National Health Service Central Registry | NR |
| Cerhan15 | 2001 | United States | Iowa Women's Health Study | State Health Registry of Iowa | Mailed questionnaire | 12 y (1986-1997) | 37 934 (418 342) | 40 (NR) | NR | Age, marital status, residence, smoking, alcohol intake, diabetes, and diet |
| Hjalgrim17 | 2007 | Sweden, Denmark | Scandinavian Donation and Transfusion (SCANDAT) database | National Cancer Registry and Hospital Registers | Scandinavian Donation and Transfusion (SCANDAT) database | Varied (Sweden, 1968-2002; Denmark, 1982-2002) | 888 843 (5 652 918) | 2853 (NR) | Incidence rates from the general populations of Sweden and Denmark | Age, sex, and country |
| Erber16 | 2009 | United States (Los Angeles, Hawaii) | Multiethnic Cohort (MEC) study | Hawaii Tumor Registry, Los Angeles County Cancer Surveillance Program, State of California Cancer Registry | Mailed questionnaire | 10 y (started between 1993 and 1996) | 193 050 (NR) | 939 (NR) | NR | Ethnicity, education, body mass index and alcohol intake |
| Author . | Year . | Country . | Source of cohort . | NHL assessment . | RBC transfusion assessment . | Mean follow-up . | Total cohort (total person-years) . | Cases observed (cases expected) . | Source of expected cases . | Adjustments . |
|---|---|---|---|---|---|---|---|---|---|---|
| Blomberg14 | 1993 | Sweden | Blood Centre Registry, Lund University Hospital | Regional tumor registry | Blood Centre Registry, Lund University Hospital | 10 y (1981-1991) | 1572 (8249) | 7 (1.7) | Malmohus County Council Registry | Age |
| Memon18 | 1994 | United Kingdom | 41 major hospitals and blood centers in England, Wales, and Scotland | National Health Service Central Registry | 41 major hospitals and blood centers in England, Wales, and Scotland | 25 y (1942-1990) | 12 690 (340 227) | 4 (1.85) | National Health Service Central Registry | NR |
| Cerhan15 | 2001 | United States | Iowa Women's Health Study | State Health Registry of Iowa | Mailed questionnaire | 12 y (1986-1997) | 37 934 (418 342) | 40 (NR) | NR | Age, marital status, residence, smoking, alcohol intake, diabetes, and diet |
| Hjalgrim17 | 2007 | Sweden, Denmark | Scandinavian Donation and Transfusion (SCANDAT) database | National Cancer Registry and Hospital Registers | Scandinavian Donation and Transfusion (SCANDAT) database | Varied (Sweden, 1968-2002; Denmark, 1982-2002) | 888 843 (5 652 918) | 2853 (NR) | Incidence rates from the general populations of Sweden and Denmark | Age, sex, and country |
| Erber16 | 2009 | United States (Los Angeles, Hawaii) | Multiethnic Cohort (MEC) study | Hawaii Tumor Registry, Los Angeles County Cancer Surveillance Program, State of California Cancer Registry | Mailed questionnaire | 10 y (started between 1993 and 1996) | 193 050 (NR) | 939 (NR) | NR | Ethnicity, education, body mass index and alcohol intake |
NHL indicates non-Hodgkin lymphoma; RBC, red blood cell; and NR, not reported.