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Table 1 Descriptive statistics of variables

From: Measuring productivity of healthcare services under environmental constraints: evidence from China

Indicator symbol Unit Sample size Minimum maximum Mean standard deviation variation coefficient
Input Healthcare personnel HW pPerson 372 8064 636,575 196,693 130,381 0.663
Fixed assets Cap Million yuan 372 86,857 12,797,953 3,243,027 2,512,375 0.775
Output Total number of outpatient consultations OP Person-time 372 4,612,351 551,857,596 116,626,362 101,404,835 0.869
Number of admissions IP Person-time 372 78,764 15,951,005 4,590,540 3,560,248 0.776
Carbon dioxide emissions CO2 Gg 372 0.363 34.713 10.659 7.332 0.688
Chemical Oxygen Demand COD Tons 372 148 13,495 4080 2797 0.686
Ammonia nitrogen NH3-N Tons 372 20 1998 618 425 0.688
  1. GG is a unit of CO2 emissions measured in the IPCC climate list, 1GG = 1000 tons