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Idiopathic Pulmonary Fibrosis (IPF) as the name suggests is a progressive disorder with no known aetiology. It is characterised by the thickening of the alveoli due to scarring resulting in cough. It is known to primarily occur in older adults over 60 years of age. The findings of IPF have a known association of Usual Interstitial Pneumonia (UIP) (Raghu et al., 2011; Kawano-Dourado & Kairalla, 2013; Wells, 2013). It has been deemed that the prognosis is generally poor when UIP has been confirmed (King et al., 2001b). The median survival rate of IPF is 50%, typically around two years after diagnosis (Raghu et al., 2011; King et al., 2001b).

Idiopathic Pulmonary Fibrosis (IPF) as the name suggests is a progressive disorder with no known aetiology. It is characterised by the thickening of the alveoli due to scarring resulting in cough. It is known to primarily occur in older adults over 60 years of age. The findings of IPF have a known association of Usual Interstitial Pneumonia (UIP) (Raghu et al., 2011; Kawano-Dourado & Kairalla, 2013; Wells, 2013). It has been deemed that the prognosis is generally poor when UIP has been confirmed (King et al., 2001b). The median survival rate of IPF is 50%, typically around two years after diagnosis (Raghu et al., 2011; King et al., 2001b).

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equired. An exploratory efficacy analyses is performed which revealed that patients which<br />

received combination therapy has experienced a decline in the functioning of their lungs than<br />

patients in the control. In the PANORAMA study, the exploratory endpoints revealed no<br />

evidences of the benefits of using oral acetylcysteine and prifenidone as a combined<br />

treatment method for IPF.<br />

5.2 Assessment of the likelihood of combination therapy towards reducing<br />

mortality rate<br />

For all the studies considered for the systematic review, it is evident that no specific<br />

information regarding the likelihood of reducing the mortality rate in IPF patients is present<br />

in the researches. However, with respect to the adverse events all studies revealed better<br />

outcomes. In the research by Sakamoto et al 88 , it is revealed that patients diagnosed with<br />

advanced IPF and with relatively lowered levels of FVS during the 12-month follow-up with<br />

the evaluation of the pulmonary function had 8 of the 17 patients in the intervention group to<br />

have stated the treatment to be effective; however only 2 out of 10 patients in the control<br />

group found the treatment as effective for advanced IPF. Furthermore, there is no specific<br />

information pertaining to the death of patients revealed in the study by Sakamoto et al 89 .<br />

However, in the study by Huang et al 90 which recruited 78 patients for the research revealed<br />

that at the 24 the week, significant outcomes were seen in the intervention group which is<br />

treated with pirfenidone and NAC. Though the outcomes were significant in the 24 th week,<br />

the same did not persist till the 48 th week. Furthermore, in the intervention group there is high<br />

rate of adverse events than the control group. Additionally, four cases died wherein two<br />

belonged to the intervention group and two belonged to the control group. However, the<br />

prolonged PFS which is evident in the research might reveal that the combined treatment can<br />

to some level decrease the rate of mortality in IPF patients.<br />

Behr et al 91 discerned the fact that life-threatening events were witnessed in one patient in the<br />

intervention group and one patient in the control group wherein death was witnessed in one<br />

88<br />

https://www.ncbi.nlm.nih.gov/pubmed/25639750<br />

89<br />

https://www.ncbi.nlm.nih.gov/pubmed/25639750<br />

90<br />

https://www.ncbi.nlm.nih.gov/pubmed/26496265<br />

91 https://www.ncbi.nlm.nih.gov/pubmed/27161257<br />

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