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Table 3 Index group means and matching estimator results for days plucking tea and non-plucking days for women

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 56 15.46 -1.75 0.24 -4.68 1.19 5.09 1.48 0.20 -0.79 3.75
-23 56 15.61 -1.31 0.34 -3.99 1.37 4.50 0.17 0.87 -1.81 2.15
-22 56 15.59 -1.35 0.36 -4.27 1.57 4.43 0.94 0.43 -1.39 3.27
-21 56 16.68 -1.17 0.44 -4.15 1.82 2.54 -0.77 0.46 -2.77 1.24
-20 56 16.93 -0.49 0.72 -3.18 2.21 3.59 -0.68 0.51 -2.69 1.32
-19 56 14.07 -2.77 0.05 -5.56 0.03 4.27 0.03 0.98 -2.22 2.27
-18 56 15.52 -1.84 0.20 -4.67 0.98 6.02 2.01 0.10 -0.35 4.37
-17 56 17.25 -0.06 0.97 -2.66 2.55 3.68 0.27 0.78 -1.63 2.18
-16 56 17.48 0.18 0.88 -2.26 2.63 4.84 1.03 0.34 -1.09 3.15
-15 56 16.77 -0.11 0.94 -2.72 2.50 3.96 0.07 0.95 -2.05 2.19
-14 56 14.16 -3.49 0.01 -6.11 -0.86 5.32 1.75 0.12 -0.46 3.96
-13 56 16.88 -0.44 0.75 -3.11 2.23 5.30 1.48 0.21 -0.85 3.80
-12 56 16.13 -1.65 0.24 -4.41 1.11 4.21 1.21 0.28 -0.96 3.38
-11 56 16.91 -1.79 0.21 -4.60 1.02 3.63 0.85 0.43 -1.28 2.98
-10 56 16.48 -2.26 0.11 -5.00 0.48 3.95 1.26 0.26 -0.92 3.43
-9 56 14.23 -4.82 0.00 -7.69 -1.95 4.63 2.12 0.08 -0.25 4.50
-8 56 14.21 -5.39 0.00 -8.16 -2.62 5.54 2.66 0.02 0.41 4.91
-7 56 14.07 -4.68 0.00 -7.72 -1.64 4.39 2.19 0.04 0.06 4.32
-6 56 14.23 -4.99 0.00 -7.72 -2.27 4.07 1.36 0.18 -0.60 3.32
-5 56 13.95 -5.21 0.00 -8.09 -2.33 5.18 2.55 0.02 0.45 4.65
-4 56 13.98 -4.77 0.00 -7.40 -2.15 5.75 2.87 0.01 0.65 5.09
-3 56 13.89 -3.32 0.03 -6.24 -0.40 4.80 1.96 0.07 -0.19 4.11
-2 56 14.36 -3.37 0.02 -6.20 -0.54 4.39 2.34 0.02 0.31 4.38
-1 56 14.20 -4.61 0.00 -7.21 -2.01 3.88 1.69 0.08 -0.21 3.59
0 56 6.00 -13.55 0.00 -15.58 -11.53 4.05 2.04 0.02 0.34 3.75
1 56 7.45 -10.90 0.00 -13.50 -8.30 4.70 2.60 0.01 0.78 4.42
2 56 9.27 -8.14 0.00 -10.96 -5.32 6.70 3.98 0.00 1.60 6.35
3/3 55 9.73 -8.84 0.00 -11.36 -6.32 6.38 3.09 0.01 0.82 5.36
4 54 11.65 -6.63 0.00 -9.45 -3.82 6.63 3.56 0.00 1.31 5.80
5 54 10.44 -6.35 0.00 -9.24 -3.45 6.59 3.95 0.00 1.94 5.96
6 54 11.83 -5.93 0.00 -8.60 -3.25 6.43 3.66 0.00 1.52 5.81
7 54 13.19 -5.34 0.00 -7.96 -2.73 5.91 3.89 0.00 1.70 6.08
8 54 12.65 -6.14 0.00 -8.59 -3.69 5.93 4.17 0.00 2.21 6.13
9 54 12.43 -5.77 0.00 -8.42 -3.12 6.22 4.44 0.00 2.34 6.54
10 54 10.93 -6.62 0.00 -9.41 -3.84 6.91 4.19 0.00 2.00 6.38
11 54 13.33 -4.99 0.00 -7.65 -2.33 5.54 2.98 0.01 0.92 5.04
12 54 12.85 -5.69 0.00 -8.43 -2.95 5.61 2.68 0.02 0.49 4.86
  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, rounded to two digits. 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 2 and month 3.