Table 1 Baseline characteristics of the study population by year (2018—2022)

Total

4,852,961 (100%)

4,957,155 (100%)

4,991,716 (100%)

5,053,670 (100%)

5,108,878 (100%)

Age

15–44

2,183,988 (45%)

2,209,398 (44.57%)

2,216,414 (44.4%)

2,204,497 (43.62%)

2,218,929 (43.43%)

45–59

1,267,021 (26.11%)

1,306,846 (26.36%)

1,334,878 (26.74%)

1,370,374 (27.12%)

1,392,801 (27.26%)

60–69

607,066 (12.51%)

622,656 (12.56%)

635,927 (12.74%)

651,006 (12.88%)

660,190 (12.92%)

70–79

450,636 (9.29%)

479,562 (9.67%)

480,311 (9.62%)

489,048 (9.68%)

499,086 (9.77%)

 > 79 years

346,465 (7.14%)

346,589 (6.99%)

346,467 (6.94%)

346,519 (6.86%)

346,001 (6.77%)

Sex

Men

2,370,318 (48.84%)

2,421,966 (48.86%)

2,440,227 (48.89%)

2,475,074 (48.98%)

2,499,848 (48.93%)

Women

2,482,643 (51.16%)

2,535,189 (51.14%)

2,551,489 (51.11%)

2,578,991 (51.03%)

2,609,701 (51.08%)

Socioeconomic status

Rural

1,159,868 (23.9%)

1,173,457 (23.67%)

1,187,011 (23.78%)

1,207,685 (23.9%)

1,222,434 (23.93%)

1st Q (least deprived)

1,080,159 (22.26%)

1,093,771 (22.06%)

1,100,788 (22.05%)

1,115,034 (22.06%)

1,128,103 (22.08%)

2nd Q

753,137 (15.52%)

763,990 (15.41%)

769,916 (15.42%)

778,361 (15.4%)

788,254 (15.43%)

3rd Q

991,232 (20.43%)

1,018,627 (20.55%)

1,024,027 (20.51%)

1,034,914 (20.48%)

1,045,552 (20.47%)

4th Q (most deprived)

868,565 (17.9%)

907,368 (18.3%)

913,508 (18.3%)

918,455 (18.17%)

927,458 (18.15%)