A Study on the Association between Low Maternal Serum Magnesium Level and Preterm Labour

Table 3

Relationship between serum magnesium and preterm labour.

Serum magnesium	Study patients		Total; 𝑁 (%)
	Case; (preterm labour)	Control; (term labour)
	𝑁 (%)	𝑁 (%)
<1.6 mg/dL	47 (47.0)	25 (25.0)	72 (36.0)
≥1.6 mg/dL	53 (53.0)	75 (75.0)	128 (64.0)
Total	100 (100.0)	100 (100.0)	200 (100.0)
Mean ± SD (mg/dL)	1.73±0.4	1.93±0.4	1.83±0.4

Relative risk = 1.83 (95% CI—0.72–0.38); 𝑃 value = 0.024.