2.7 Statistical analysis
Categorical variables are expressed as numbers and percentages. Continuous values are reported as mean ± 1 standard deviation. Linear regression analysis and Bland-Altman plots with assessment of systematic bias and 95% confidence intervals were used to compare LS and CP pacing characteristics. Systematic differences in measurements between the 2 modalities were assessed using Student test. All tests were two-sided and a p value <0.05 was considered as statistically significant. Statistical analyses were performed using Prism Graphpad and SPSS Statistics 24 (IBM Corporation, Armonk, NY, USA).