This experiment compared the 10-item Recovering Quality of Life questionnaire (ReQoL-10) to other health quality of life scales: the instrument (EQ-5D-3L) currently preferred by the National Institute for Health and Clinical Excellence (NICE) and the 12-item General Health Questionnaire (GHQ). To test for ordering effects, half of respondents were presented with ReQoL-10 and EQ-5D-3L earlier in the survey and the GHQ later on, with the other half receiving the reverse, with the GHQ coming earlier in the survey and ReQoL-10 and EQ-5D-3L later. For the continuing wave 14 sample (identified by hhorig<19), the treatment allocations were made within the questionnaire script, with half the sample allocated to each group. The allocations are recorded in the variable n_req10cond on record n_indresp_ip:
1 Ask ReQoL and EQ5D early and GHQ late
2 Ask ReQoL and EQ5D late and GHQ early
For the wave 14 refreshment sample (identified n_hhorig=19) the allocations were made prior to fieldwork at the household level, again with half the sample allocated to each group. This was done to test the differences in experiment variances based on whether the allocations occur at the household-level (so everyone in the same household receives the same treatment) or at the individual-level (so treatment is allocated in during the survey to each individual independent of household) impact outcomes, including precision, differently. The allocations are recorded in the variable n_ff_req10cond on record n_hhsamp_ip (allocation stratified by sampleorig, ff_incentw14, ff_gridmodew13, l_gor_dv):
1 ReQoL and EQ5D early and GHQ late
2 ReQoL and EQ5D late and GHQ early
The variables affected by this experiment are on the record n_indresp_ip: reqol1ear, reqol2ear, reqol3ear, reqol4ear, reqol5ear, reqol6ear, reqol7ear, reqol8ear, reqol9ear, reqol10ear, reqphysear, eq3lmobear, eq3lcareear, eq3lactear, eq3lpainear, eq3lanxear, scghqaear, scghqbear, scghqcear, scghqdear, scghqeear, scghqfear, scghqgear, scghqhear, scghqiear, scghqjear, scghqkear, scghqlear, reqol1lat, reqol2lat, reqol3lat, reqol4lat, reqol5lat, reqol6lat, reqol7lat, reqol8lat, reqol9lat, reqol10lat, reqphyslat, eq3lmoblat, eq3lcarelat, eq3lactlat, eq3lpainlat, eq3lanxlat, scghqalat, scghqblat, scghqclat, scghqdlat, scghqelat, scghqflat, scghqglat, scghqhlat, scghqilat, scghqjlat, scghqklat, scghqllat
