The pant style should be such that it compliments the body shape and helps in the effective implementation of the responsibilities. Flare leg scrub pants can help in balancing your bust or hips, but trip you up if you are petite.
Waistbands of the scrub pants can have drawstrings, buttons, or both to hold the pants in place. Both of them help in adjusting the pant and make a firm grip around your waist. But if you face weight fluctuations, then drawstrings are more preferable than buttons.