
    In a medical monitoring system analyzing wearable device data, find the health indicator measurement associated with the lowest risk score from a series of paired readings. Each reading consists of a health measurement value and its calculated risk score, and the system needs to identify the specific health measurement that corresponds to the minimum risk score to help prioritize patient care decisions.
    

    
from operator import itemgetter

def index_minimum(test_list):
    """
    In a medical monitoring system analyzing wearable device data, find the health indicator measurement associated with the lowest risk score from a series of paired readings. Each reading consists of a health measurement value and its calculated risk score, and the system needs to identify the specific health measurement that corresponds to the minimum risk score to help prioritize patient care decisions.
    

    """
from operator import itemgetter

def index_minimum(test_list):
    """
    In a medical monitoring system analyzing wearable device data, find the health indicator measurement associated with the lowest risk score from a series of paired readings. Each reading consists of a health measurement value and its calculated risk score, and the system needs to identify the specific health measurement that corresponds to the minimum risk score to help prioritize patient care decisions.
    

    """
    res = min(test_list, key=itemgetter(1))[0]
    return res