Table 1 Characteristics of included studies
Author/Year Study title | Design | Country | Age | Sample size | Gender (Male/ Female) | ||||
|---|---|---|---|---|---|---|---|---|---|
Cases | Control | Total | Cases | Control | Cases | Control | |||
Ad'hiah et al. 2018 [11] Secretor status of ABH blood group Ag s in a sample of Iraqui cancer patients | Case-control study | Iraq | 53.9±13.1 | 44.2±12.7 | 84 | 50 | 34 | 23/27 | 17/17 |
Bakhtiari et al. 2019 [21] Salivary secretes status of blood group Ag s in patients with head and neck cancer | Case-control study | Iran | 58.69±14.8 | 49.13 ±11.1 | 110 | 57 | 53 | 32/25 | 27/26 |
cCerović et al. 2008 [12] Examining the presence of ABO (H) Ag s of blood types in saliva of patients with oral cancer | Case- control study | Croatia | 62 | 60 | 114 | 57 | 57 | 47/10 | 47/10 |
Garrett et al. 1971 [25] Blood groups and secretes status in patients with salivary gland tumors | Case- control study | UK | NR | NR | 1961 | 407 | 1554 | NR | NR |
aHallikeri et al. 2014 [20] | Case- control study | India | NR | NR | 99 | 33 | 66 | NR | NR |
Analysis of salivary secretor status in patient with oral submucous- fibrosis | |||||||||
Lamey et al. 1994 [6] Secretor status and oral cancer | Prospective | Ireland (Sri Lankan population) | NR | NR | 200 | 100 | 100 | 80/20 | 80/20 |
bRai et al. 2015 [23] Assessment of ABO blood grouping and secretor status in the saliva of the patients with OPMD s | Cross- sectional study | India | NR | NR | 64 | 32 | 32 | NR | NR |
cVidas et al. 1999 [24] Examining the secretor status in saliva of patient with oral pre- cancerous lesions | Cross- sectional study | Croatia | 61 | 61 | 122 | 61 | 61 | NR | NR |