Table 4 Patient characteristics for those having magnesium measured vs. not measured
From: Serum magnesium, mortality and disease progression in chronic kidney disease
Factor | N missing | Overall (N = 73,542) | No Magnesium (N = 62,974) | Have Magnesium (N = 10,568) | p-value |
|---|---|---|---|---|---|
Age | 0 | 72.0 ± 11.8 | 72.6 ± 11.4 | 68.7 ± 13.3 | < 0.001a |
Male | 0 | 32,180 (43.8) | 27,211 (43.2) | 4969 (47.0) | < 0.001c |
African American | 0 | 9255 (12.6) | 7810 (12.4) | 1445 (13.7) | < 0.001c |
Smoking | 0 | < 0.001c | |||
No | 58,506 (79.6) | 51,092 (81.1) | 7414 (70.2) | ||
Yes | 5182 (7.0) | 4459 (7.1) | 723 (6.8) | ||
Missing | 9854 (13.4) | 7423 (11.8) | 2431 (23.0) | ||
BMI | 2532 | 29.6 ± 6.6 | 29.7 ± 6.6 | 29.2 ± 7.0 | < 0.001a |
BMI group | 0 | < 0.001c | |||
< 18.5 kg/m2 | 963 (1.3) | 759 (1.2) | 204 (1.9) | ||
18.5–24.9 kg/m2 | 16,508 (22.4) | 13,789 (21.9) | 2719 (25.7) | ||
25–29.9 kg/m2 | 25,009 (34.0) | 21,718 (34.5) | 3291 (31.1) | ||
30–34.9 kg/m2 | 15,962 (21.7) | 13,865 (22.0) | 2097 (19.8) | ||
35–39.9 kg/m2 | 7281 (9.9) | 6312 (10.0) | 969 (9.2) | ||
40+ kg/m2 | 5287 (7.2) | 4530 (7.2) | 757 (7.2) | ||
Missing | 2532 (3.4) | 2001 (3.2) | 531 (5.0) | ||
Diabetes | 0 | 17,409 (23.7) | 15,234 (24.2) | 2175 (20.6) | < 0.001c |
Malignancy | 0 | 18,226 (24.8) | 15,355 (24.4) | 2871 (27.2) | < 0.001c |
Hypertension | 0 | 62,427 (84.9) | 54,429 (86.4) | 7998 (75.7) | < 0.001c |
Hyperlipidemia | 0 | 56,763 (77.2) | 49,460 (78.5) | 7303 (69.1) | < 0.001c |
CAD | 0 | 14,958 (20.3) | 12,841 (20.4) | 2117 (20.0) | 0.40c |
CHF | 0 | 5964 (8.1) | 4375 (6.9) | 1589 (15.0) | < 0.001c |
CVD | 0 | 6810 (9.3) | 5916 (9.4) | 894 (8.5) | 0.002c |
PVD | 0 | 2432 (3.3) | 2153 (3.4) | 279 (2.6) | < 0.001c |
ACEI/ARB | 0 | 46,076 (62.7) | 40,051 (63.6) | 6025 (57.0) | < 0.001c |
Diuretics | 0 | 47,685 (64.8) | 41,001 (65.1) | 6684 (63.2) | < 0.001c |
Statin | 0 | 42,014 (57.1) | 36,876 (58.6) | 5138 (48.6) | < 0.001c |
Beta Blocker | 0 | 40,438 (55.0) | 34,475 (54.7) | 5963 (56.4) | 0.001c |
Magnesium supplement | 0 | 7156 (9.7) | 4584 (7.3) | 2572 (24.3) | < 0.001c |
Proton pump inhibitor | 0 | 31,152 (42.4) | 25,916 (41.2) | 5236 (49.5) | < 0.001c |
eGFR | 0 | 47.8 ± 10.2 | 48.1 ± 10.1 | 46.3 ± 11.0 | < 0.001a |
CKD stage | 0 | < 0.001c | |||
45–59 | 50,169 (68.2) | 43,597 (69.2) | 6572 (62.2) | ||
30–44 | 17,765 (24.2) | 14,877 (23.6) | 2888 (27.3) | ||
15–29 | 5608 (7.6) | 4500 (7.1) | 1108 (10.5) | ||
Albumin | 10,714 | 4.1 ± 0.46 | 4.1 ± 0.42 | 3.9 ± 0.59 | < 0.001a |
Hemoglobin | 12,475 | 12.8 ± 1.8 | 12.9 ± 1.8 | 12.3 ± 1.9 | < 0.001a |
Potassium | 684 | 4.3 ± 0.53 | 4.3 ± 0.52 | 4.3 ± 0.59 | < 0.001a |
Calcium | 770 | 9.5 ± 0.58 | 9.6 ± 0.56 | 9.4 ± 0.68 | < 0.001a |
CO2 | 751 | 25.9 ± 3.3 | 25.9 ± 3.2 | 25.8 ± 3.8 | 0.003a |
Insurance grouped | 0 | < 0.001c | |||
Medicaid | 1320 (1.8) | 1079 (1.7) | 241 (2.3) | ||
Medicare | 50,892 (69.2) | 43,991 (69.9) | 6901 (65.3) | ||
Missing | 2796 (3.8) | 2205 (3.5) | 591 (5.6) | ||
Other | 18,534 (25.2) | 15,699 (24.9) | 2835 (26.8) |