Derivation
variable: grip_right_1_gs (table[s]: NUTdata_KAR, NUTdata_LLW)
variable: grip_right_2_gs (table[s]: NUTdata_KAR, NUTdata_LLW)
variable: grip_right_3_gs (table[s]: NUTdata_KAR, NUTdata_LLW)
variable: grip_right1 (table[s]: gap_combined)
variable: grip_right2 (table[s]: gap_combined)
variable: grip_right3 (table[s]: gap_combined)
<NUT data:>
egen hg_right=rowmean(grip_right_1_gs grip_right_2_gs grip_right_3_gs)
<GAP data:>
egen hg_right=rowmean(grip_right1 grip_right2 grip_right3)