Later effects of grounding of tanker Braer on health in Shetland

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Abstract
In June 1993 participants in the first phase were given an extended questionnaire. A systematic sample of non-participating exposed people was surveyed by telephone. Participants aged 16 and over completed the general health questionnaire (28 questions).3 Weight, peak expiratory flow, urine analysis haematology, and liver and renal function were measured. For categorical data X2 values or Fisher's exact tests with two tailed probability were computed; testing of hypotheses was performed by determining odds ratios and confidence intervals by using discordant pairs when applicable. For continuous data, means and mean differences for paired data and their 95% confidence intervals were calculated.