Cycling in one of the most polluted cities in the world: Exposure to noise and air pollution and potential adverse health impacts in Delhi

Table 1 Descriptive statistics

Statistics	dB(A) (L_Aeq,1 min)	NO₂(µg/m³)	Inhalation (µg NO₂)
N	4157	4368	4368
Percentiles
1	68.1	29.1	0.8
5	71.7	83.8	2.2
10	73.1	109.5	3.0
25 (first quartile)	75.8	148.4	4.3
50 (median)	78.2	196.1	6.2
75 (third quartile)	80.7	245.5	9.3
90	82.8	296.7	13.1
95	84.3	340.5	15.4
99	86.6	431.0	21.2
Mean^a	79.7	201.4	7.1
Standard deviation (SD)^a	4.2	79.4	4.3
ACF^b index with
k = 1	0.62	0.59	0.79
k = 2	0.35	0.38	0.64
Moran I^c	0.36 (d = 250)	0.27 (d = 300)	0.29 (d = 450)

^aMean and SD of dB values are computed using the seewave package [60]. ^bAutocorrelation function (ACF) index [43]. ^cTo calculate Moran’s I statistic, we used a binary matrix and defined as neighbours of the segment i all the segments in a buffer of length d around i with d ranging from 50 to 500 m with a step of 50 m. Only the highest values are reported here

ISSN: 1476-072X