In 1978 MCA took samples of fish and found PCBs, mercury, and Mirex, which led them to recommend that women of childbearing age, children under 15, and pregnant women cease consumption of fish from the St . Lawrence(Hauptmann 1988 64).
They will cease consumption of the study product at the end of week 3 (day 20) and will then have their last visit on day 21.
The women in our study were aware of social expectations that they cease consumption of alcohol during pregnancy [ 26] and some responded by abstaining.
In addition, the studies made recommendations to the Navajo community to cease consumption of organ meat, stop drinking water from sources known to contain elevated uranium levels, and stay away from the river bank under dry or windy conditions.
Analysis was restricted to participants with drinking recorded from 4 consecutive waves and complete cases on all variables which resulted in small numbers of participants who ceased consumption.
A higher proportion of participants who ceased consumption had developed an LLI at age 33 (10%), 42 (21%), and 50 (19%) than those who reduced to special occasion drinking (5, 16, and 14%, respectively) and persistent drinkers (3, 16, and 13%, respectively).
The proportion of persistent drinkers who ceased consumption was 2% at age 33 (n = 93), 1% at age 42 (n = 63), and 3% at age 50 (n = 53) (Table 1).
We also repeated the analysis using LLI at a previous time point preceding the change in consumption, to assess effects of past health (e.g., for those who ceased consumption at age 42, 2 models were created one with changes in LLI at age 42 as the exposure, and another with changes in LLI at age 33 as the exposure).
Similarly, participants who ceased consumption were past persistent drinkers who selected "never" drinking at a successive wave (e.g., participants who ceased consumption at age 42 were persistent drinkers at age 23 and age 33).
Results are consistent with other studies which show that ex-drinkers have worse health (Green and Polen, 2001; Wannamethee and Sharper, 1997) and have higher probability of ceasing consumption with a medical diagnosis in middle age (Liang and Chikritzhs, 2011; Newsom et al., 2012).
