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. 2019 Aug 26;2(2):72–79. doi: 10.1136/bmjnph-2019-000030

Table 1.

Baseline characteristics of participants

Characteristics Total (n, %) Annual average NDVI (mean±SD) MMSE scores (mean±SD)
38 327 0.40±0.15 21±9.72
Age (years) (mean±SD) 88±11.45 / /
Age group (years)
 65–79 8528 (22.25) 0.38±0.15 27±4.11
 80–89 10 161 (26.51) 0.40±0.14 24±7.14
 90–99 10 418 (27.18) 0.40±0.15 19±9.80
 ≥100 9220 (24.06) 0.40±0.15 13±10.31
Gender
 Males 15 747 (41.09) 0.39±0.15 24±8.37
 Females 22 580 (58.91) 0.40±0.15 19±10.04
Ethnicity
 Han Chinese 36 156 (94.34) 0.39±0.15 21±9.76
 Ethnic minorities 2171 (5.66) 0.46±0.13 21±9.02
Marital status
 Married and living with their spouse 10 287 (26.84) 0.38±0.15 26±6.52
 Not married 28 040 (73.16) 0.40±0.15 19±10.08
Residence
 Urban area 9076 (23.68) 0.24±0.13 21±9.87
 Rural area 29 251 (76.32) 0.45±0.12 20±9.66
Occupation
 Professional work 2659 (6.94) 0.31±0.16 26±6.92
 Non-professional work 35 668 (93.06) 0.40±0.15 20±9.77
Education
 Formal education 13 347 (34.82) 0.37±0.16 25±7.68
 No formal education 24 980 (65.18) 0.41±0.14 18±9.96
Financial support
 Financial independence 9142 (23.85) 0.33±0.16 26±6.86
 Financial dependence 29 185 (76.15) 0.42±0.14 19±9.96
Social and leisure activity index (mean±SD) 2.07±1.55 / /
Smoking status
 Yes 6804 (17.75) 0.41±0.14 24±8.16
 No 31 523 (82.25) 0.40±0.15 20±9.91
Alcohol consumption
 Yes 7383 (19.26) 0.41±0.14 23±8.87
 No 30 944 (80.74) 0.39±0.15 20±9.85
Physical activity
 Yes 10 923 (28.50) 0.36±0.15 24±7.38
 No 27 404 (71.50) 0.41±0.14 19±10.11
Geographic region
 Central China 5580 (14.56) 0.44±0.12 20±9.84
 Eastern China 15 491 (40.42) 0.40±0.16 21±9.60
 Northeastern China 2922 (7.62) 0.28±0.11 20±10.58
 Northern China 1922 (5.01) 0.26±0.11 21±9.81
 Northwestern China 512 (1.34) 0.37±0.14 21±8.53
 Southern China 6931 (18.08) 0.44±0.13 21±9.21
 Southwestern China 4969 (12.96) 0.40±0.13 20±10.06

MMSE, Mini-Mental State Examination; NDVI, Normalised Difference Vegetation Index.

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