Comparisons of propensity-score matched ICG and non-ICG for OHH-related outcomes
A total of 198 propensity-score matched pairs were successfully identified between the ICG and non-ICG. The data collected on demographics, occupation, and lifestyle were compared to balance between the matched ICG and non-ICG (Table 2). The matched ICG was associated with doubled incidence of body pain when compared to the matched non-ICG (56.6% vs. 24.2%, p<0.001). The comparisons showed that cardiologists in ICG had significantly higher incidence of neck pain (29.8% vs. 11.6%, p<0.001), shoulder pain (33.3% vs. 14.1%, p<0.001), back pain (45.5% vs. 14.1%, p<0.001), buttock pain (4.0% vs. 0.5%, p<0.046), knee pain (17.7% vs. 3.0%, p<0.001), thigh pain (7.6% vs. 1.0%, p=0.004), calf pain (10.6% vs. 1.0%, p<0.001), ankle pain (8.1% vs. 2.0%, p=0.010) and foot pain (5.1% vs. 0.0%, p=0.031). No significant differences were identified for the verbal pain rating scale, the incidence of severe pain, pain treatment rate and sick leave days due to pain in the last five years. Interventional cardiologists had higher incidence of at least one comorbidity (36.4% vs. 11.2%, p<0.001) and specific comorbidities including bone and joint diseases (21.7% vs. 8.6%, p<0.001), cataract (3.5% vs. 0.0%, p=0.039) and anxiety (8.1% vs. 2.5%, p=0.029). The OHH-related outcomes are summarized in Table 3.