There were 50 patients in the treatment group. None were admitted to the ICU. There were 26 patients in the control group. Half of them, 13 out of 26, were admitted to the ICU. So 13⁄26 vs. 0⁄50.
That’s not what the paper says
Of 50 patients treated with calcifediol, one required admission to the ICU (2%),
That’s not what the paper says
The conclusions still hold, of course.