Quite a few comorbities were controlled for. In statistics controlled for means "no, this isn't the reason you're seeing this number." Rather than making vague and unsubstantiated claims. Why don't you tell us what mortality might have risen that you believe confounded the results? And back it up with a study. These are the factors that were chosen a-priori: age, sex, anticoagulant use, atrial fibrillation, chronic obstructive pulmonary disease, diabetes, hypertension, income quintile, and rural or urban home location.
So unless you have some magical mystery comorbitiy, it was controlled for and therefore your comment is vague confusion peddling.