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Table 1 Descriptive Statistics for Variables

From: PM2.5 exposure and anxiety in China: evidence from the prefectures

Variable Mean S. D. Minimum Maximum
Anxiety overall −14.36 61.42 − 1070.88 555.21
between   63.28 − 527.52 170.85
within   28.5 − 611.8 369.99
GDP
(10 million YUAN)
overall 25,260.21 34,796.64 1534.09 326,799
between   33,197.75 1877.55 252,222.6
within   9278.67 −38,063.65 102,245
Housing price
(YUAN)
overall 7786.84 6278.27 662 58,654
between   5068.98 3069 46,223.83
within   2151.64 − 8736.33 22,153.67
Urbanization rate
(%)
overall 55.82 14.33 24.69 100
between   14.1 26.5 99.92
within   2.38 46.06 72.01
Internet development level overall 0.22 0.41 0.01 11.21
between   0.30 0.04 4.41
within   0.28 −1.66 9.50
PM2.5 overall 53.8 28.92 8.58 210
(μg·m−3) between   17.65 9.71 109.61
within   22.99 6.24 172.05
Number of medical institutions overall 532.79 1422.40 16.67 50,800
between   716.09 33.33 10,403.64
within   1224.46 − 9543.58 40,929.15
Total hospital beds overall 49,875.04 62,720.37 500 2,411,300
between   31,345.24 1000 435,039.4
within   54,456.75 − 353,626.3 2,026,136
Number of physicians overall 24,855.84 27,461.73 50 934,500
between   16,064.50 91.67 165,586.6
within   22,415.29 − 132,360.9 793,769.2