| Supported by meta-analysis/systematic review |
Cancer |
Systematic Review [1, 2]
Cohort Study [3-5]
Case Series [6-8]
Case Control Study [9] |
| Cerebrovascular disease |
Meta-Analysis [10-13]
Synthesis of Evidence [14]
Cohort Study [15-17] |
| Chronic kidney disease |
Meta-Analysis [13, 18]
Cohort Studies [16, 19-40]
Case Series [41-43] |
| COPD |
Meta-Analysis [44-46]
Systematic Review [47, 48] |
| Diabetes mellitus, type 1 |
Meta-Analysis [49]
Case Series [42]
Cohort Study [15, 50-55] |
| Diabetes mellitus, type 2 |
Meta-Analysis [56]
Case Series [42]
Longitudinal Study [57]
Cohort Study [49, 53, 57-62] |
| Heart conditions (such as heart failure, coronary artery disease, or cardiomyopathies) |
Meta-Analysis [63-65]
Cohort Study [15, 16] |
| Smoking, current and former |
Meta-Analysis [44, 64, 66-73] |
| Obesity |
Meta-Analysis [74-76]
Cohort [24, 77-85] |
| Pregnancy |
Systematic Review [86, 87]
Case Control [88, 89]
Case Series [90-92]
Cohort Study [93-96] |
| Supported by mostly cohort, case-control, or cross-sectional studies (if there is a systematic review or meta-analysis available, it represents one condition in a larger category of conditions) |
Children with certain underlying conditions |
Systematic Review [97, 98]
Cross-Sectional Study [99-101]
Cohort Study [102-110]
Case Series [111, 112] |
| Down syndrome |
Cohort Study [113, 114] |
| HIV |
Cohort Study [32, 115-117]
Case Series [118-120] |
| Neurologic conditions |
Review [121]
Cross-Sectional Study [99]
Cohort Study [16, 102] |
| Overweight |
Cohort Study [80]
Case Series [85] |
| Other lung disease (including interstitial lung disease, pulmonary fibrosis, pulmonary hypertension) |
Cohort [122-124] |
| Sickle cell disease |
Cohort [111, 112, 125, 126]
Case Series [111, 126-141] |
| Solid organ or blood stem cell transplantation |
Meta-Analysis [83]
Case Series [142-151]
Cohort [152] |
| Substance use disorders |
Case-Control Study [153-155]
Cohort Study [156, 157] |
| Use of corticosteroids or other immunosuppressive medications |
Cohort Study [158]
Cross Sectional [159]
Case Series [160-162] |
| Supported by mostly case series, case reports or, if other study design, the sample size is small (and no systematic review or meta-analysis available were reviewed) |
Cystic fibrosis |
Case Series [163-165]
Cohort [166] |
| Thalassemia |
Case Series [167-170]
Cross Sectional [171] |
| Supported by mixed evidence |
Asthma |
Meta-Analysis [172-174]
Review [175]
Case Series [176]
Cohort Study [16, 40, 177-182] |
| Hypertension |
Meta-Analysis [64, 183-186]
Systematic Review [187]
Cohort Study [15, 16, 19, 179, 188-194]
Case Series [195] |
| Liver disease |
Meta-Analysis [196-200]
Cohort [19, 28, 41, 201-215]
Case-Control [216-221]
Cross sectional [222]
Case Series [223-225] |
| Immune deficiencies |
Meta-Analysis [226]
Cohort [227-229]
Case Series [142, 143, 151, 230-235] |
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