Table 3 The association between serum calcium concentration and in-hospital mortality of patients with acute myocardial infarction: subgroup analyses.

From: The synergy between diurnal temperature range and calcium concentration help to predict hospital mortality in patients with acute myocardial infarction

Model	Serum calcium concentration
Model	Ca-Q1	Ca-Q2	Ca-Q3	Ca-Q4	P-interaction
Age					0.519
< 60 years	Ref	0.24 (0.09–0.66)	0.60 (0.30–1.23)	0.17 (0.06–0.46)
≥ 60 years	Ref	0.53 (0.34–0.82)	0.48 (0.29–0.79)	0.11 (0.05–0.24)
Gender					0.289
Male	Ref	0.86 (0.46–1.61)	0.90 (0.47–1.70)	0.12 (0.04–0.36)
Female	Ref	0.33 (0.19–0.56)	0.41 (0.24–0.70)	0.15 (0.07–0.31)
Current smoker					0.582
No	Ref	0.71 (0.43–1.18)	0.71 (0.42–1.19)	0.08 (0.03–0.20)
Yes	Ref	0.24 (0.12–0.48)	0.39 (0.20–0.76)	0.19 (0.08–0.44)
Current alcohol use					0.858
No	Ref	0.46 (0.31–0.69)	0.54 (0.36–0.81)	0.15 (0.08–0.27)
Yes	Ref	0.68 (0.10–4.57)	0.88 (0.14–5.58)	NA
History of hypertension					0.963
No	Ref	0.38 (0.22–0.67)	0.48 (0.28–0.83)	0.16 (0.08–0.36)
Yes	Ref	0.62 (0.35–1.10)	0.36 (0.36–1.20)	0.08 (0.03–0.24)
History of diabetes					0.190
No	Ref	0.39 (0.24–0.64)	0.52 (0.32–0.84)	0.09 (0.04–0.23)
Yes	Ref	0.71 (0.35–1.44)	0.66 (0.31–1.41)	0.24 (0.10–0.58)
ACEI/ARB					0.263
No	Ref	0.56 (0.32–0.99)	0.75 (0.43–1.32)	0.12 (0.05–0.31)
Yes	Ref	0.41 (0.23–0.71)	0.42 (0.24–0.76)	0.15 (0.07–0.34)
Beta-blocker					0.542
No	Ref	0.62 (0.35–1.08)	0.55 (0.29–1.02)	0.20 (0.09–0.46)
Yes	Ref	0.38 (0.21–0.66)	0.59 (0.35–0.99)	0.08 (0.03–0.21)
Type of AMI					0.263
NSTEMI	Ref	0.28 (0.13–0.59)	0.58 (0.30–1.13)	0.06 (0.02–0.23)
STEMI	Ref	0.61 (0.39–0.98)	0.59 (0.36–0.97)	0.19 (0.10–0.38)
DTR					0.020
DTR-Q1	Ref	0.55 (0.22–1.36)	0.57 (0.23–1.45)	0.44 (0.16–1.24)
DTR-Q2	Ref	0.65 (0.28–1.48)	0.50 (0.21–1.23)	0.16 (0.05–0.55)
DTR-Q3	Ref	0.63 (0.30–1.30)	0.86 (0.39–1.86)	0.14 (0.04–0.50)
DTR-Q4	Ref	0.23 (0.10–0.53)	0.44 (0.21–0.92)	0.03 (0.01–0.20)

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