A nested case-control study of residential and personal magnetic field measures and miscarriages.

摘要: We conducted a nested case-control study (177 cases, 550 controls) to assess the relation between retrospective magnetic field measures and clinical miscarriage among members of northern California Kaiser Permanente medical care system. also prospective substudy 219 participants same parent cohort determine whether 12-week 30-week exposure assessments were similar. evaluated wire codes, area measures, three personal meter metrics: (1) average difference consecutive levels (a rate-of-change metric), (2) maximum level, (3) time-weighted average. For codes we found little association. metrics (30 weeks after last menstrual period), positive associations. Each was divided into quartiles, with lowest quartile as referent. Starting highest quartile, adjusted odds ratios 95% confidence intervals 3.1 (95% CI = 1.6-6.0), 2.3 1.2-4.4), 1.5 0.8-3.1) for metric; 1.9 1.0-3.5), 1.4 0.7-2.8) value; 1.7 0.9-3.3), 0.9-3.3) The ratio conveyed by being above 24-hour 2 milligauss 1.0 0.5-2.1). Exposure assessment measurements at 12 poorly correlated those taken 30 weeks. Nonetheless, results regarding risk consistent results.