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Table 2 Summary statistics

From: Cognitive functioning among poor elderly persons: evidence from Peru

Variable Total Working Retired Diff.a Female Male Diff.a
Mean Std. dev. Mean Mean Mean Mean
Cognitive score 11.69 2.04 11.86 11.26 0.60*** 11.27 12.02 −0.75***
Memory 5.06 1.15 5.11 4.96 0.15*** 5.05 5.07 −0.02
Mental intactness 6.62 1.37 6.75 6.30 0.45*** 6.22 6.95 −0.73***
Male (yes = 1) 0.55 0.50 0.66 0.30 0.36***    
Mother tongue Quechua (yes = 1) 0.25 0.43 0.27 0.20 0.07*** 0.26 0.24 0.03*
Mother tongue Aymara (yes = 1) 0.05 0.22 0.06 0.02 0.05*** 0.05 0.05 −0.01
Age 71.17 4.39 70.70 72.34 −1.64*** 71.08 71.24 −0.16
Illiterate (yes = 1) 0.28 0.45 0.24 0.40 −0.16*** 0.50 0.11 0.40***
Retired (yes = 1) 0.29 0.45     0.45 0.15 0.30***
Arm span 156.03 10.91 157.55 152.22 5.32*** 148.39 162.17 −13.78***
Haemoglobin 132.33 18.22 133.43 129.58 3.85*** 127.44 136.27 −8.83***
Urban (yes = 1) 0.38 0.49 0.32 0.53 −0.20*** 0.44 0.33 0.11***
Variables at district level:
 Poverty rate (%) 47.14 22.22 47.89 45.25 2.64*** 45.73 48.27 −2.54***
 Altitude (metres/1000) 2.33 1.31 2.44 2.05 0.39*** 2.34 2.32 0.02
 Std. dev. of altitude 0.34 0.23 0.35 0.32 0.03*** 0.33 0.35 −0.02***
 Number of social assistance centres 1.34 1.58 1.24 1.59 −0.35*** 1.38 1.30 0.07
 Number of hospitals 0.81 1.73 0.68 1.13 −0.46*** 0.89 0.74 0.16***
 Number of social centres for old age 0.41 1.57 0.31 0.67 −0.36*** 0.46 0.38 0.08
 Electricity coverage +50% (yes = 1) 0.92 0.27 0.91 0.94 −0.02** 0.92 0.92 0.01
 Water coverage +50% (yes = 1) 0.84 0.36 0.84 0.86 −0.02* 0.86 0.83 0.02**
 Sewage system (yes = 1) 0.98 0.13 0.98 0.99 −0.01 0.98 0.98 0.00
  1. *p < 0.1; **p < 0.05; ***p < 0.01
  2. a T test of mean differences between (i) working and retired individuals and (ii) females and males