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Table 2 Index group means and matching estimator results for days plucking tea and non-plucking days for men

From: Do the socioeconomic impacts of antiretroviral therapy vary by gender? A longitudinal study of Kenyan agricultural worker employment outcomes

Duration on ART N Days Plucking (IG Mean)\1 Estimated Mean Difference
(IG – CG)\1
P > |z|\2 95% CI LL\2 95% CI UL\2 Days Non-Plucking Tasks (IG Mean) Estimated Mean Difference
(IG – CG)\1
P > |z|\2 95% CI LL\2 95% CI UL/2
-24 41 16.59 -0.43 0.78 -3.42 2.57 4.76 -0.47 0.75 -3.30 2.36
-23 41 17.02 0.46 0.76 -2.49 3.40 5.85 1.26 0.39 -1.58 4.09
-22 41 15.22 -1.30 0.43 -4.50 1.90 6.17 2.22 0.13 -0.64 5.08
-21 41 16.20 -0.62 0.72 -4.03 2.80 6.56 2.82 0.08 -0.31 5.94
-20 41 15.10 -2.33 0.16 -5.58 0.92 6.88 2.81 0.07 -0.24 5.85
-19 41 15.80 -2.41 0.12 -5.48 0.65 4.93 0.82 0.56 -1.90 3.53
-18 41 14.61 -3.30 0.04 -6.37 -0.22 6.83 2.25 0.13 -0.67 5.16
-17 41 15.66 -2.86 0.06 -5.88 0.16 5.73 3.07 0.02 0.54 5.60
-16 41 17.07 -2.24 0.14 -5.24 0.75 3.10 0.32 0.77 -1.81 2.45
-15 41 16.39 -2.34 0.18 -5.74 1.07 3.34 0.61 0.63 -1.85 3.07
-14 41 16.71 -1.66 0.26 -4.57 1.25 4.59 -0.17 0.89 -2.62 2.27
-13 41 17.12 0.13 0.93 -3.05 3.32 4.29 -0.38 0.77 -2.98 2.22
-12 41 19.12 1.24 0.42 -1.79 4.28 3.90 -0.19 0.89 -2.88 2.50
-11 41 18.32 0.03 0.98 -2.82 2.88 3.98 0.02 0.99 -2.66 2.71
-10 41 16.00 -1.97 0.22 -5.12 1.18 5.32 1.67 0.27 -1.28 4.62
-9 41 16.63 -1.06 0.49 -4.08 1.95 6.63 3.07 0.03 0.32 5.81
-8 41 15.68 -3.76 0.02 -6.99 -0.53 5.98 2.96 0.03 0.36 5.56
-7 41 15.49 -3.84 0.02 -7.02 -0.66 3.63 0.59 0.63 -1.81 2.99
-6 41 17.27 -1.90 0.21 -4.90 1.09 4.49 1.31 0.32 -1.28 3.91
-5 41 15.63 -2.46 0.13 -5.63 0.72 4.73 1.32 0.33 -1.32 3.96
-4 41 14.20 -3.66 0.03 -7.02 -0.30 5.34 1.67 0.27 -1.27 4.62
-3 41 13.20 -2.85 0.08 -6.05 0.34 5.32 1.15 0.46 -1.87 4.17
-2 41 14.59 -2.70 0.12 -6.09 0.69 4.12 -0.04 0.98 -2.86 2.77
-1 41 14.80 -2.33 0.14 -5.38 0.73 4.63 1.03 0.48 -1.84 3.91
0 41 6.66 -11.27 0.00 -13.85 -8.69 2.78 -1.48 0.20 -3.74 0.78
1 41 7.76 -9.34 0.00 -12.21 -6.48 5.12 0.95 0.51 -1.88 3.78
2 41 9.44 -8.37 0.00 -11.32 -5.42 6.32 2.22 0.11 -0.52 4.96
3 41 11.90 -4.65 0.00 -7.74 -1.56 7.68 3.68 0.01 0.86 6.51
4 41 12.56 -4.37 0.01 -7.55 -1.19 6.93 2.80 0.04 0.10 5.49
5 41 12.78 -4.21 0.02 -7.64 -0.79 5.49 0.98 0.49 -1.82 3.78
6\3 40 14.90 -2.44 0.11 -5.47 0.58 4.65 0.44 0.76 -2.36 3.24
7 40 15.73 -0.99 0.54 -4.16 2.18 3.38 -1.72 0.24 -4.58 1.14
8 40 15.95 -0.58 0.72 -3.73 2.57 2.93 -2.18 0.12 -4.95 0.59
9 40 15.28 -1.00 0.56 -4.35 2.34 3.83 -1.52 0.31 -4.44 1.39
10 40 16.75 0.35 0.83 -2.86 3.55 3.28 -1.65 0.26 -4.50 1.19
11 40 14.48 -1.90 0.27 -5.29 1.48 4.65 -0.77 0.61 -3.75 2.20
12 40 15.18 -1.10 0.49 -4.22 2.02 5.40 -0.25 0.86 -3.16 2.65
  1. 1/ IG = index group, and CG = matching comparison group. The estimated mean difference is the bias-adjusted sample average treatment effect on the treated using nearest the neighbor matching estimator nnmatch in Stata 10, with 4 comparison workers matched to each index worker based on age, months of work experience, and gang.
  2. 2/ p-value for a z-test that mean difference = 0. 95% CI LL and UL are the lower and upper levels of the 95% confidence interval for the estimated average treatment effect on the treated.
  3. 3/ One index worker retired at the end of month 5.