Table 4.
Comparison of baseline measures between non-participantsa and full-participants at follow-up
| Non-participantsa (n = 1976) |
Full participants (n = 2456) |
P-valueb | |||
|---|---|---|---|---|---|
| n | % | n | % | ||
| Gender | |||||
| Male | 934 | 47.3 | 1092 | 44.5 | 0.06 |
| Female | 1042 | 52.7 | 1364 | 55.5 | |
| Total | 1976 | 100 | 2456 | 100 | |
| Median |
95% CI |
Median |
95% CI |
||
| Age | 44.3 | 43.6–45.2 | 47.6 | 46.9–48.3 | <0.01 |
|
n |
% |
n |
% |
||
| Baseline APc status | |||||
| AP free | 1698 | 85.9 | 2129 | 86.7 | 0.47 |
| AP | 278 | 14.1 | 327 | 13.3 | |
| Total | 997 | 100 | 2456 | 100 | |
| Median |
95% CI |
Median |
95% CI |
||
| Psychological scales | |||||
| Sleep Problems | 5 | 4–5 | 5 | 4–5 | 0.20 |
| GHQ | 0 | 0–0 | 0 | 0–0 | 0.36 |
| Somatic Symptoms | 0 | 0–0 | 0 | 0–0 | 0.14 |
| Health Anxiety | 9 | 8–9 | 9 | 8–9 | 0.75 |
| Illness Behaviour | 4 | 4–4 | 4 | 4–4 | 0.03 |
| HAD Anxiety | 5 | 5–5 | 5 | 5–5 | 0.12 |
| HAD Depression | 3 | 2–3 | 2 | 2–3 | 0.01 |
| Life Eventsd | 1 | 0–1 | 1 | 1–1 | 0.07 |
a
Non-participants include subjects who did not agree to further contact at baseline (n = 979) and those who were non/incomplete responders at follow-up (n = 997).
b
All values are by Mann–Whitney U test except gender baseline abdominal pain status, which are by χ2 test.
c
AP, abdominal pain.
d
Life events during the 6 months prior to completion of the baseline questionnaire.