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. Author manuscript; available in PMC: 2019 Jan 1.
Published in final edited form as: Soc Sci Med. 2017 Dec 6;197:127–135. doi: 10.1016/j.socscimed.2017.12.003

Table 1.

Sample characteristics, NIDS Waves 1, 2, and 3

Wave 1 Wave 2 Wave 3

Sample Size Proportion/Mean (SD) Sample Size Proportion/Mean (SD) Sample Size Proportion/Mean (SD)

Total 12,868 15,351 14,567

Female 7,887 61.3% 9,226 60.1% 8,817 60.5%

Race/population group
African 10,347 80.4% 12,541 81.7% 11,882 81.6%
Coloured 1,831 14.2% 2,070 13.5% 1,997 13.7%
Asian/Indian 160 1.2% 179 1.2% 163 1.1%
White 530 4.1% 561 3.7% 525 3.6%

Age in years 12,868 37.5 (17.4) 15,351 37.9 (17.7) 14,567 39.5 (17.4)

Highest Education level
No Education 1,658 12.9% 1,772 11.7% 1,621 11.2%
Some General Ed & Training 4,291 33.4% 4,913 32.5% 4,168 28.8%
General Ed & Training 1,200 9.4% 1,459 9.7% 1,267 8.8%
Some Further Ed & Training 2,884 22.5% 3,533 23.4% 3,688 25.5%
Further Ed & Training 1,968 15.3% 2,359 15.6% 2,281 15.8%
Higher Education 831 6.5% 1,063 7.0% 1,447 10.0%

Monthly household income, Rand 6,227 5,248.9 (9,373.1) 6,442 5,479.2 (11,173.7) 7,317 5,719.8 (9,387.9)

Household size 6,227 4.1 (2.6) 6,442 4.4 (2.9) 7,317 4.2 (2.8)

Rural household 3,116 50.0% 3,393 49.4% 3,654 47.4%

Household receipt of government grants 3,604 58.1% 3,727 58.1% 4,334 59.3%

CES-D-10 score 12,438 8.1 (4.8) 13,817 7.1 (4.2) 13,625 7.0 (4.4)

Employment status
Employed 4,683 38.1% 4,302 30.5% 4,982 36.6%
Unemployed 2,315 18.8% 1,981 14.1% 2,312 17.0%
Not economically active 5,297 43.1% 7,815 55.4% 6,316 46.4%

Marital Status
Currently Married/Cohabiting 4,573 36.8% 4,699 33.2% 4,659 34.2%
Currently single 7,858 63.2% 9,451 66.8% 8,974 65.8%

Trust of neighbors
Very likely 1,210 10.2% 2,327 17.6% 1,736 13.1%
Somewhat or not likely 10,650 89.8% 10,909 82.4% 11,525 86.9%

Trust of strangers
Very likely 547 4.7% 1,322 10.2% 1,018 7.8%
Somewhat or not likely 11,208 95.3% 11,659 89.8% 11,989 92.2%