Table 1 Characteristics of the cohort at inclusion by magnesium concentration at residential address
Characteristic | Category | Individuals n (%) | Individuals (%) for each magnesium group (mg/L) | ||||
|---|---|---|---|---|---|---|---|
1 (0.1–5) | 2 (> 5–10) | 3 (> 10–15) | 4 (> 15–20) | 5 (> 20–62) | |||
Overall | 4,264,809 (100) | 10.6 | 28.3 | 20.4 | 12.2 | 28.6 | |
Sex | Female | 2,183,300 (51.2) | 10.5 | 28.3 | 20.2 | 12.3 | 28.7 |
Male | 2,081,509 (48.8) | 10.7 | 28.4 | 20.5 | 12.0 | 28.4 | |
Age | 30–59 | 3,269,858 (76.7) | 10.6 | 27.8 | 20.5 | 11.8 | 29.3 |
60–69 | 475,514 (11.1) | 10.8 | 30.6 | 20.3 | 13.5 | 24.9 | |
70–79 | 327,352 (7.7) | 10.6 | 30.4 | 19.6 | 13.5 | 25.9 | |
≥ 80 | 192,085 (4.5) | 10.1 | 29.3 | 19.0 | 12.6 | 29.0 | |
Civil status | Cohabitating | 2,850,546 (66.8) | 11.5 | 29.9 | 20.6 | 12.3 | 25.7 |
Living alone | 1,414,263 (33.2) | 8.7 | 25.1 | 20.0 | 11.8 | 34.4 | |
Education | ≤ 9 years | 1,576,835 (37) | 11.6 | 29.6 | 20.0 | 12.0 | 26.8 |
10–12 years | 1,812,707 (42.5) | 11.0 | 29.0 | 20.8 | 12.3 | 26.8 | |
≥ 13 years | 875,267 (20.5) | 7.9 | 24.6 | 20.1 | 12.0 | 35.4 | |
Income | Lowest | 1,054,367 (24.7) | 9.7 | 26.7 | 20.8 | 11.1 | 31.7 |
Second lowest | 867,631 (20.3) | 12.0 | 31.0 | 21.4 | 11.3 | 24.3 | |
Middle | 831,798 (19.5) | 11.7 | 30.1 | 20.8 | 11.8 | 25.6 | |
Second highest | 783,979 (18.4) | 10.7 | 28.4 | 20.2 | 12.5 | 28.2 | |
Highest | 727,034 (17) | 8.7 | 25.5 | 18.1 | 14.7 | 33.0 | |
Calendar year | 2002–2003 | 3,232,498 (75.8) | 10.4 | 29.5 | 20.2 | 12.3 | 27.7 |
2004–2005 | 200,827 (4.7) | 13.6 | 28.8 | 20.1 | 9.2 | 28.2 | |
2006–2007 | 175,448 (4.1) | 10.8 | 25.2 | 22.9 | 14.9 | 26.3 | |
2008–2009 | 167,241 (3.9) | 11.2 | 25.3 | 20.8 | 8.9 | 33.8 | |
2010–2011 | 170,972 (4) | 9.3 | 19.8 | 20.7 | 18.8 | 31.3 | |
2012–2013 | 155,102 (3.6) | 10.8 | 25.4 | 20.6 | 9.3 | 33.9 | |
2014–2015 | 162,721 (3.8) | 10.6 | 23.8 | 20.6 | 9.2 | 35.7 | |
Water supply area category | Stable | 1,571,831 (36.9) | 17.0 | 38.6 | 24.1 | 11.4 | 8.9 |
Unstable | 2,680,928 (62.9) | 6.8 | 22.3 | 18.2 | 12.6 | 40.1 | |
Missing | 12,050 (0.3) | 9.3 | 28.1 | 21.3 | 13.1 | 28.2 | |