PR to record the prevalence of disease/condition, still births, neonatal death, maternal mortality

[RachelMurray-Watson]

The point prevalence is recorded for a number of modules and conditions within modules (Alri, BladderCancer, BreastCancer, CardioMetabolicDisorders ( chronic_ischemic_hd, chronic_kidney_disease, chronic_lower_back_pain, diabetes, hypertension), COPD, Depression, Diarrhoea, Epilepsy, Hiv, Labor (Intrapartum stillbirth), Malaria, Measles, NewbornOutcomes, OesophagealCancer, OtherAdultCancer, PostnatalSupervisor, PregnancySupervisor (Antenatal stillbirth), ProstateCancer, RTI, Schisto, TB, Demography (maternal_deaths, newborn_deaths).

Additional questions:

• Okay to calculate the prevalence of diarrhoea? It is a not really a disease in its own right, more of a symptom
• For some modules (RTI), may be more accurately described by calculating incidence, rather than prevalence. Is that useful/okay? Or should it be skipped?

Other notes:

• COPD is defined as ch_lung_function > 3.
• Have not included events in the CardioMetabolic Module (ever_heart_attack and ever_stroke) as would be a cumulative incidence living people who have had such events

[RachelMurray-Watson]

so that it's formally part of the definition of a disease module

Grand! Have that done

[RachelMurray-Watson]

just adding here the comment made in-person: I like the way this is being done overall.... and we should add this new method to the Module base class so that it's formally part of the definition of a disease module (in the same way that report_dalys is.)

(Based on conversation yesterday) - changed so that it is no longer in base class (as not all modules are disease modules), but there is an assertion checking to see that if something uses the healthburden module, it must have the report_prevalence function