Table 1 Baseline characteristics of Golestan Cohort Study participants by blood group phenotypes
From: Mortality and cancer in relation to ABO blood group phenotypes in the Golestan Cohort Study
Variable |  | O (number = 14,971) | A (number = 16,705) | B (number = 13,555) | AB (number = 4,810) | Rh + (number = 46,805) | Rh-(number = 3,238) |
|---|---|---|---|---|---|---|---|
Sex | female | 8738 (58.4) | 9555 (57.2) | 7760 (57.2) | 2757 (57.3) | 26974 (57.6) | 1837 (56.7) |
| Â | male | 6233 (41.6) | 7150 (42.8) | 5795 (42.8) | 2053 (42.7) | 19831 (42.4) | 1401 (43.3) |
Age a | Â | 52.1 (9) | 52.1 (9) | 52.2 (9.1) | 52.1 (9) | 52.1 (9.0) | 52.2 (8.9) |
Ethnicity | Turkmen | 10836 (72.4) | 12677 (75.9) | 10033 (74) | 3705 (77) | 35060 (74.9) | 2192 (67.7) |
| Â | non-Turkmen | 4135 (27.6) | 4028 (24.1) | 3522 (26) | 1105 (23) | 11745 (25.1) | 1046 (32.3) |
Residence | urban | 3022 (20.2) | 3257 (19.5) | 2794 (20.6) | 955 (19.9) | 9247 (19.8) | 783 (24.2) |
| Â | rural | 11949 (79.8) | 13448 (80.5) | 10761 (79.4) | 3855 (80.1) | 37558 (80.2) | 2455 (75.8) |
Education | none | 10388 (69.4) | 11785 (70.5) | 9514 (70.2) | 3431 (71.3) | 32919 (70.3) | 2199 (67.9) |
| Â | Up to 8Â years | 3246 (21.7) | 3547 (21.2) | 2910 (21.5) | 1004 (20.9) | 9985 (21.3) | 723 (22.3) |
| Â | High school | 993 (6.6) | 1019 (6.1) | 855 (6.3) | 288 (6) | 2929 (6.3) | 226 (7) |
| Â | University | 344 (2.3) | 354 (2.1) | 276 (2) | 87 (1.8) | 972 (2.1) | 90 (2.8) |
Smoking pack-year | Non-smoker | 11751 (78.5) | 13149 (78.7) | 10581 (78.1) | 3753 (78) | 36685 (78.4) | 2551 (78.8) |
Q1 (≤3) | 858 (5.7) | 934 (5.6) | 783 (5.8) | 272 (5.7) | 2682 (5.7) | 165 (5.1) | |
Q2 (3 to 10) | 772 (5.2) | 880 (5.3) | 695 (5.1) | 233 (4.8) | 2406 (5.1) | 174 (5.4) | |
Q3( 10 to 24) | 820 (5.5) | 900 (5.4) | 757 (5.6) | 289 (6) | 2581 (5.5) | 185 (5.7) | |
Q4 (>24) | 770 (5.1) | 842 (5) | 739 (5.5) | 263 (5.5) | 2451 (5.2) | 163 (5) | |
Opium use | Â | 2535 (16.9) | 2854 (17.1) | 2306 (17) | 804 (16.7) | 7977 (17) | 523 (16.2) |
Socioeconomic status | Low | 4065 (27.2) | 4703 (28.2) | 3803 (28.1) | 1366 (28.4) | 13054 (27.9) | 884 (27.3) |
Low-middle | 3268 (21.8) | 3699 (22.1) | 3092 (22.8) | 1085 (22.6) | 10464 (22.4) | 680 (21) | |
High-middle | 3740 (25) | 4286 (25.7) | 3392 (25) | 1167 (24.3) | 11792 (25.2) | 793 (24.5) | |
High | 3898 (26) | 4017 (24) | 3268 (24.1) | 1192 (24.8) | 11495 (24.6) | 881 (27.2) | |
Medical history at baseline | CVD | 959 (6.4) | 1007 (6) | 803 (5.9) | 282 (5.9) | 2834 (6.1) | 217 (6.7) |
Hypertension | 2968 (19.8) | 3284 (19.7) | 2726 (20.1) | 896 (18.6) | 9264 (19.8) | 611 (18.9) | |
DM | 999 (6.7) | 1178 (7.1) | 952 (7) | 325 (6.8) | 3224 (6.9) | 230 (7.1) | |
Cancer | 52 (0.4) | 56 (0.3) | 34 (0.3) | 17 (0.4) | 149 (0.3) | 10 (0.3) |