From: Maternal urinary manganese and risk of low birth weight: a case–control study
Manganese levelsa | Age < 28 years old (n = 392) | Age ≥ 28 years old (n = 424) | P for heterogeneity | ||||
---|---|---|---|---|---|---|---|
Ca/Co | ORb (95 % CI) | ORc (95 % CI) | Ca/Co | ORb (95 % CI) | ORc (95 % CI) | ||
Tertile 1 | 31/98 | 1.80 (0.91, 3.56) | 1.88 (0.74, 4.80) | 23/106 | 0.72 (0.39, 1.34) | 0.84 (0.31, 2.24) | 0.19 |
Tertile 2 | 17/98 | 1.00 | 1.00 | 31/106 | 1.00 | 1.00 | |
Tertile 3 | 50/98 | 3.14 (1.67, 5.92) | 2.74 (1.07, 7.03) | 52/106 | 1.69 (0.98, 2.90) | 1.98 (0.82, 4.74) |