Similar(8)
There are known issues with data completeness in the eruption record, with under-recording affected by factors including time and location.
Cumulative curves of the number of eruptions normalised to the number of recorded events prior to 1 ka (Figure 5) enables quantification of the decline in under-recording by comparison with recording rate.
Not all comorbidity (or 'complexity') will have been captured here, due to the exclusion of physical ill-health discharge records and probable under-recording of secondary psychiatric diagnostic codes.
However, the possibility of under-recording and delays in the recording process cannot be ruled out, and these could limit the validity of the results obtained.
It may also be due to under-recording of pressure ulcers in patients' records and/or an over-estimation in the previous studies, and/or a lower prevalence in 2012/2013 than in 2005/2006.
When the AIC or AICc difference of the two models is less than 2, the under-recording was calculated as the weighted average of under-recordings, which are estimated from both exponential and double-exponential models and weighted with their relative likelihoods (Table 3), given by: {L}_r= exp left(frac{A_s-{A}_l}{2}right) (18).
We would like to estimate historical under-recording rates, to better interpret the historical record, and, by extension, to better predict the future.
Although this paper attributes variations in the record of explosive volcanism largely to under-recording, we recognise at the outset that interpretations are confounded by the possibility of non-stationarity in rates of volcanism.
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