Table 1. Baseline characteristics according to albumin-corrected serum calcium tertile.
| Characteristic | Corrected serum calcium tertile, mg/dL | Total | P valuea | ||
|---|---|---|---|---|---|
| Tertile 1 (<8.70) |
Tertile 2 (8.70–8.94) |
Tertile 3 (>8.94) |
|||
| Number | 4,174 | 4,334 | 4,198 | 12,706 | |
| Incident case | 1,263 (28.0) | 1,095 (27.4) | 1,090 (26.0) | 3,448 (27.1) | 0.089 |
| Male sex | 2,319 (55.6) | 2,395 (55.3) | 2,159 (51.4) | 6,873 (54.1) | <0.001b |
| Smoker | 0.045b | ||||
| Never | 2,352 (56.3) | 2,431 (56.1) | 2,474 (58.9) | 7,257 (57.1) | |
| Current | 697 (16.7) | 734 (16.9) | 689 (16.4) | 2,120 (16.7) | |
| Past | 1,125 (27.0) | 1,169 (27.0) | 1,035 (24.7) | 3,329 (26.2) | |
| Age, yr | 50.5±8.1 | 51.0±8.3 | 51.3±8.2 | 51.0±8.2 | <0.001 |
| WC, cm | 81.1±8.7 | 81.4±8.7 | 80.9±8.6 | 81.1±8.7 | 0.029 |
| BMI, kg/m2 | 23.3±2.6 | 23.4±2.6 | 23.3±2.6 | 23.3±2.6 | 0.170 |
| SBP, mm Hg | 110±14 | 112±14 | 113±15 | 112±14 | <0.001 |
| DBP, mm Hg | 68±10 | 69±10 | 70±10 | 69±10 | <0.001 |
| FPG, mg/dL | 88±13 | 89±13 | 91±15 | 89±14 | <0.001 |
| HbA1c, % | 5.4±0.5 | 5.4±0.5 | 5.5±0.6 | 5.4±0.6 | <0.001 |
| Triglyceride, mg/dL | 111±58 | 115±61 | 117±68 | 114±62 | <0.001 |
| HDL-C, mg/dL | 59±14 | 59±13 | 60±14 | 59±14 | 0.001 |
| Corrected calcium, mg/dL | 8.56±0.08 | 8.82±0.07 | 9.17±0.18 | 8.85±0.28 | - |
| Diabetes | 170 (4.1) | 174 (4.0) | 201 (4.8) | 545 (4.3) | 0.148b |
| Hypertension | 404 (9.7) | 495 (11.4) | 512 (12.2) | 1,411 (11.1) | 0.001b |
| Hypercholesterolemia | 78 (1.9) | 119 (2.7) | 133 (3.2) | 330 (2.6) | 0.001b |
| Presence of two components of MetS | 938 (22.5) | 1,107 (25.5) | 1,123 (26.8) | 3,168 (24.9) | <0.001b |
| HOMA2-IR (n=7,945) | 1.16 (0.49) | 1.16 (0.48) | 1.13 (0.45) | 1.15 (0.47) | 0.066 |
Values are presented as number (%) or mean±standard deviation.
WC, waist circumference; BMI, body mass index; SBP, systolic blood pressure; DBP, diastolic blood pressure; FPG, fasting plasma glucose; HbA1c, glycosylated hemoglobin; HDL-C, high density lipoprotein cholesterol; MetS, metabolic syndrome; HOMA2-IR, homeostasis model assessment index 2 for insulin resistance.
aOne-way analysis of variance for continuous variables, bChi-square test.