Spatial cluster mapping and environmental modeling in pediatric inflammatory bowel disease

Table 3 Summary statistics for variables of interest for the 88 local health areas used for modeling

Explanatory variable	Minimum LHA value	Maximum LHA value	Mean of LHA values
Chinese ethnic origin (%)	0.00	47.21	4.35
Indigenous ethnic origin (%)	1.07	93.22	14.38
Jewish ethnic origin (%)	0.00	2.82	0.45
Non-Jewish European ethnic origin (%)	10.67	90.98	70.91
South Asian ethnic origin (%)	0.00	31.19	2.71
Average family income ($)	60265.01	216769.60	91884.26
Family size	2.25	3.13	2.76
Population density (per square km)	0.01	9443.44	553.95
Rural population (%)	0.00	100.00	53.05
NDVI maximum	0.59	0.80	0.70
NDVI mean	0.23	0.62	0.45
NO2 (ppb)	0.10	23.61	7.71
O3 (ppb)	17.49	39.54	30.14
PM2.5 (μg m3)	2.73	8.32	6.02
UV vitamin D summer (J/m-2)	4488.80	7272.52	6053.15
UV vitamin D winter (J/m-2)	102.02	449.6	274.98
Glyphosate used in common crops (kg/ha/yr)	0.00	6.71	0.61
Glyphosate used in alfalfa crops (kg/ha/yr)	0.00	0.17	0.02
Glyphosate used in corn crops (kg/ha/yr)	0.00	6.06	0.49
Glyphosate used in wheat crops (kg/ha/yr)	0.00	0.21	0.02
Metam used in fruits and vegetables (kg/ha/yr)	0.00	8.82	0.60
Petroleum oil used in orchards and grapes (kg/ha/yr)	0.00	4.75	0.28

LHA: Local Health Area; NDVI: Normalized difference vegetation index; UV: Ultraviolet; NO₂: Nitrogen dioxide; O₃: Ozone; PM_2.5: Fine particulate matter.