Given that the increase among vaginal births occurred in the context of no increase in morbidity, this may reflect an increased frequency of use of red cell transfusion for less severe cases of haemorrhage post-vaginal delivery.
16 31 However, a recent population-based Danish study found associations between level of education and stage at diagnosis, 32 which is in line with results from a study from USA. 33 In the present study, early-stage disease was more common in patients with severe co-morbidity, which may reflect that the lung malignancy was detected in the course of medical attention for other conditions.
Sex differences in respiratory morbidity, may also reflect differences in the management of morbidity.
It is possible that the increased service utilisation rates we observed may reflect increased morbidity or a general propensity to access healthcare services in the PCP-contact group, such that PCP contact had no causal effect on subsequent healthcare utilisation.
GP EMR data were used to create proxy visit rates (these may include both actual GP visits, in addition to other events documented in a person's records) for various intervals and to capture any increase in visit rates at the end of the preperiod that may reflect increased morbidity in a patient.
However given that the NbM, raphé nuclei, locus ceruleus or DEX are not conventionally associated with motor function suggests that the results may reflect co-morbidity.
Evidence for underlying muscle damage and degeneration in ambulatory IC patients has been presented [ 15, 16] but such observations may reflect co-morbidities and have not been directly linked to IC symptoms.
The lack of stronger effects may reflect the high morbidity of respiratory disease outbreaks at Taï.
This presence of measles as the ninth leading cause of morbidity in children under five years may reflect the low coverage of vaccination in Guinea [ 21].
Although results need to be considered in the context of data limitations, the association between prescribed antidepressants and fatal MVC may reflect unmeasured co-morbidities, such as combined effects of prescribed and over-the-counter medications and/or alcohol or other substance abuse.
