Table 3 Stratified analyses to identify variables that may modify the association between total magnesium intake (per 1-mg/(100 kcal*d) increase) and all-cause mortality

Age, years

 < 60

251

0.92 (0.73–1.18)

0.52

 ≥ 60

666

0.97 (0.94–0.99)

0.012

0.52

Sex

 Female

460

0.96 (0.93–1.00)

0.031

 Male

457

0.98 (0.94–1.02)

0.25

0.44

BMI, kg/m²

 < 28

397

0.97 (0.93–1.01)

0.13

 ≥ 28

520

0.99 (0.96–1.03)

0.70

0.007

Hypertension

 No

183

0.89 (0.82–0.97)

0.007

 Yes

734

0.99 (0.96–1.02)

0.37

0.074

Diabetes

 No

561

0.96 (0.92–1.00)

0.067

 Yes

356

0.99 (0.94–1.04)

0.64

0.29

Hyperlipidemia

 No

266

0.95 (0.89–1.00)

0.050

 Yes

651

0.98 (0.95–1.01)

0.24

0.96

Smoking

 No

342

0.97 (0.93–1.01)

0.14

 Yes

575

0.95 (0.91–1.00)

0.028

0.11

Serum creatinine, µmol/L

 < 100

620

0.96 (0.92–1.00)

0.032

 ≥ 100

297

0.98 (0.94–1.02)

0.31

0.43

Energy, kcal/d

 < 2000

630

0.98 (0.96–1.01)

0.32

 ≥ 2000

287

0.93 (0.89–0.97)

< 0.001

0.15