Using a validated sampling strategy (23), households of Caucasian ethnicity within essentially the same geographic locale as the catchment area from which the patients were referred were randomly selected and mailed an introductory letter, followed by up to 12 telephone calls inviting the individual with the earliest date of birth from the household to participate.
There was no information on prevalence of LDA prescribing in the catchment area from which the hospital received its acute admissions.
The randomisation will be undertaken using a computer-generated blocked randomisation sequence, stratified by low and high socioeconomic status of the catchment area from which women were sampled, and will be produced by the study statistician, with treatment allocation not available to investigators at any stage.
The analysis was done for four categories of rainwater harvesting systems differentiated by the size of catchments from which water is collected and the intensity of concentration and/or storage of the collected rainwater.
The area is drained by the Ahar River, which enters the catchment from the northeast and flows toward the southeast.
Since the Tibetan plateau contains a lot of "closed" catchments, from which meltwater cannot easily escape, large amounts of melting could happen without GRACE detecting them.Indeed, a survey by Dr Yao and his colleagues shows the area of the glacial lakes on the plateau has increased by about 26% since the 1970s.
The sampling frame for the present study was carefully designed in consultation with the ABS (as described above) to ensure a representative population-catchment from which 18 34 year old participants could be enumerated.
Figure 3 shows the average annual ice balance of the catchment from the 45 year simulation.
Turning towards the geographic market, every hospital system has a specific catchment area from which most of its patients come from.
The recession limb of a hydrograph is the result of the gradual release of water from the catchment which influenced more by the storage characteristics of the catchment.
