| Authors & Year | Purpose | Country and Sample Size | Design | Assessment Tool | Result | Associated Risk Factors |
| (Abah et al., 2015) | Assess HRQOL according to age in octogenarians | 44 studies | Systematic review | SF-36 HADS SAQ Karnofsky | HRQOL improved, however there was minority in whom quality of life declined (8% - 19%) | Sociodempgraphic, psychological, comorbidities |
| (Ay et al., 2013) | HRQOL after MVR and MV Repair | Turkey 56 | Prospective before, and after 6 months on phone | SF-36 | Female, AF, MVR method affect physical and mental QOL negatively (p = 0.033, p = 0.003, & p = 0.015) | Age, gender, functional capacity, rhythm, HTN, DM, applied surgical method, Echo result |
| (Baig et al., 2013) | QOL after CABG in elderly | USA and Europe 23 studies, 4793 pts | Systematic review (20 cohort, 3 RCT, 14 retrospective, 9 prospective) | SF-20 SF-36 SFQ 15-D Euro QOL SAQ DASI Karnofsky | Support the conclusion that performing CABG in the elderly may be associated with HRQOL improvements | Age, social life, comorbidities, ICU length of stay more than 2 days |
| (Irfan, Rahaman, Noman, & Mithun, 2013) | To assess HRQOL among CABG | Dhaka 90 | Cross sectional | RAND SF-36 | HRQOL improved with higher level of mental domain in comparison to physical | Age, income, education |
| (Kaur, Kumar, & Kumari, 2013) | Assess and compare HRQOL before and after CABG | Punjab 60 | Exploratory Comparative Survey (before and 3 months after) | WHO-BREF | HRQOL before CABG is higher than HRQOL after CABG. Positive significant correlation between HRQOL and lifestyle before and after CABG | Educational status, monthly income, marital status, lifestyle, gender. |
| (Kurfirst et al., 2014) | HRQOL before and after cardiac surgery, and the effect of age and related factors | Prague 310 | Prospective consecutive observational study Before and 1 year after | SF-36 | Older patients show more improvement in HRQOL than younger patients | Preoperative HRQOL, age, gender, income, comorbidities |
| (Lavdaniti, Tsiligiri, Palitzika, Chrysomalli, Marigo, Drosos, 2015) | Investigate QOL after CABG and the related factors | Greece 84 | Prospective after 6 months | SF-36 | The domains of QOL that have higher means are: role emotional (68.25 ± 40.71), role physical (55 ± 33.13), vitality (53.99 ± 20.97) and social functioning (45.09 ± 22.71) | Gender, nationality, occupational status smoking, family status, educational status and comorbities |