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Table 4 Faucets ranked by the odds of a person requiring any assistance and the odds of committing no errors when using the faucet to turn on the water for handwashing

From: Examining the impact of familiarity on faucet usability for older adults with dementia

Group Odds based rank Required assistance Committed no errors
Faucet Odds P*<0.05 Faucet Odds P*<0.05
Aware/Mild†,§ 1 Crosshead -   Dual Lever - -
2 Single Lever - - Crosshead 36.67 I, PW
3 Infrared - - Single Lever 18.50 I, PW
4 Dual Lever 0.01 PW Infrared 3.58 C, SL
5 Plastic Wand 0.14 DL Plastic Wand 2.00 C, SL
Moderate 1 Dual Lever 0.17 C, PW Dual Lever 6.50 C, SL, I, PW
2 Infrared 0.24 C, PW Single Lever 2.33 DL, I, PW
3 Single Lever 0.25 PW Crosshead 1.62 DL, PW
4 Crosshead 0.41 DL, I, PW Infrared 0.91 DL, SL
5 Plastic Wand 0.80 C, DL, I, SL Plastic Wand 0.64 C, DL, SL
Severe 1 Dual Lever 7.57 SL, I Dual Lever 19.00 C, SL, I, PW
2 Crosshead 8.50 I Crosshead 3.07 DL, PW
3 Single Lever 8.67 DL Infrared 1.86 DL, PW
4 Infrared 19.00 C, DL Single Lever 1.64 DL, PW
5 Plastic Wand - - Plastic Wand 0.33 C, DL, SL, I
  1. * Wald Chi-sq P-values were calculated using pairwise comparisons run between faucet types within the same dementia group; C=crosshead, SL=Single Lever, DL=Dual Lever, I=Infrared, PW=Plastic Wand.
  2. P-values could not be calculated for the crosshead, single lever, or infrared for the aware/mild group regarding assistance as these faucets required no assistance with these faucets.
  3. P-values could not be calculated for the plastic wand regarding assistance with the severe group as all participants required assistance with this faucet.
  4. § A pairwise comparison could not be done with the dual lever regarding errors with the aware/mild group as no participants committed an error using this faucet.