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Table 4 Sensitivity analysis to compare Greedy 5-to-1 matching and other propensity score matching techniques

From: Differences in proxy-reported and patient-reported outcomes: assessing health and functional status among medicare beneficiaries

  Greedy 5 to 1 digit matching Kernel matching Radius matching Mahalanobis metric matching
  RR   RR   RR   RR  
  (95 % CI)   (95 % CI)   (95 % CI)   (95 % CI)  
Physical status         
ADL         
 Bathing/showering 2.32 (2.18, 2.47) * 2.34 (2.18, 2.51) * 2.33 (2.17, 2.50) * 2.21 (2.06, 2.36) *
 Dressing 2.57 (2.38, 2.78) * 2.66 (2.46, 2.89) * 2.62 (2.41, 2.84) * 2.69 (2.48, 2.91) *
 Eating 3.10 (2.71, 3.53) * 3.31 (2.90, 3.79) * 3.20 (2.80, 3.66) * 3.91 (3.39, 4.50) *
 Get in/out of bed/chair 1.41 (1.33, 1.49) * 1.44 (1.35, 1.54) * 1.41 (1.32, 1.51) * 1.62 (1.52, 1.74) *
 Walking 1.16 (1.11, 1.20) * 1.17 (1.12, 1.24) * 1.16 (1.11, 1.22) * 1.20 (1.14, 1.27) *
 Using the toilet 2.73 (2.48, 3.00) * 2.84 (2.57, 3.13) * 2.84 (2.57, 3.13) * 2.62 (2.38, 2.88) *
IADL         
 Telephone 3.70 (3.42, 3.99) * 4.08 (3.74, 4.44) * 4.03 (3.70, 4.38) * 3.37 (3.11, 3.64) *
 Doing light housework 1.96 (1.85, 2.06) * 1.98 (1.86, 2.10) * 1.97 (1.85, 2.10) * 2.01 (1.89, 2.15) *
 Doing heavy housework 1.28 (1.24, 1.32) * 1.28 (1.23, 1.34) * 1.28 (1.22, 1.34) * 1.30 (1.24, 1.36) *
 Preparing meals 2.79 (2.63, 2.96) * 2.88 (2.70, 3.08) * 2.84 (2.66, 3.03) * 2.74 (2.57, 2.93) *
 Shopping 2.32 (2.21, 2.43) * 2.39 (2.26, 2.53) * 2.34 (2.21, 2.48) * 2.06 (1.95, 2.18) *
 Managing money 3.83 (3.62, 4.06) * 4.23 (3.95, 4.53) * 4.01 (3.75, 4.28) * 3.40 (3.19, 3.62) *
Mobility         
 Stooping/crouching/kneeling 0.97 (0.95, 0.99) * 0.96 (0.93, 1.00)   0.97 (0.94, 1.01)   1.01 (0.97, 1.05)  
 Lifting/carrying 10 pounds 1.18 (1.14, 1.22) * 1.19 (1.14, 1.24) * 1.18 (1.13, 1.23) * 1.27 (1.22, 1.33) *
 Extending arms above shoulder 1.26 (1.21, 1.32) * 1.25 (1.19, 1.32) * 1.24 (1.18, 1.31) * 1.26 (1.20, 1.33) *
 Writing/handling object 1.28 (1.23, 1.34) * 1.29 (1.23, 1.36) * 1.29 (1.22, 1.35) * 1.35 (1.29, 1.43) *
 Walking 1/4 mile or 2–3 blocks 1.09 (1.06, 1.12) * 1.09 (1.04, 1.13) * 1.08 (1.04, 1.12) * 1.12 (1.08, 1.17) *
Affective status         
 Depressed 1.03 (1.01, 1.05) * 1.03 (0.99, 1.07)   1.03 (0.99, 1.07)   1.06 (1.02, 1.10) *
 Losing interest 1.12 (1.06, 1.19) * 1.16 (1.09, 1.24) * 1.14 (1.07, 1.22) * 1.21 (1.13, 1.30) *
Cognitive status         
 Memory loss 1.96 (1.86, 2.07) * 2.00 (1.88, 2.12) * 1.98 (1.86, 2.10) * 1.80 (1.69, 1.91) *
 Decision making 2.85 (2.69, 3.03) * 3.10 (2.89, 3.32) * 2.99 (2.79, 3.20) * 2.64 (2.48, 2.82) *
 Concentrating 1.80 (1.72, 1.88) * 1.95 (1.85, 2.06) * 1.90 (1.80, 2.00) * 1.74 (1.65, 1.84) *
Social status         
 Social activities 1.20 (1.16, 1.24) * 1.20 (1.15, 1.25) * 1.19 (1.14, 1.24) * 1.19 (1.14, 1.24) *
Sensory status         
 Seeing 1.01 (0.97, 1.06)   1.01 (0.96, 1.07)   1.01 (0.96, 1.06)   1.06 (1.01, 1.12) *
 Hearing 1.09 (1.05, 1.13) * 1.09 (1.03, 1.14) * 1.10 (1.05, 1.16) * 1.10 (1.05, 1.16) *
 Eating solid foods 1.05 (0.99, 1.12)   1.07 (1.00, 1.15)   1.07 (1.00, 1.15)   1.15 (1.08, 1.24) *
  1. RR: Relative risk; CI: Confidence interval; ADL: Activities of daily living; IADL: Instrumental activities of daily living *: Significant at 0.05 level