Table 3 Gender and age differences between exclusions, non-responders, and responders at each time point
From: Acute flares of knee osteoarthritis in primary care: a feasibility and pilot case-crossover study
|  | All mailed participants (N = 442) | Non-responders and refusals (N = 338) | Exclusions (N = 76) | Eligible (N = 28) | Eligible but dropped out (N = 14) | Baseline responders (N = 14) | Responders to at least one scheduled follow-up (N = 8) | Reported flares (N = 7) |
|---|---|---|---|---|---|---|---|---|
Gender | ||||||||
 Males | 199 (45) | 152 (45) | 30 (40) | 17 (61) | 8 (57) | 9 (64) | 6 (75) | 5 (71) |
 Females | 243 (55) | 186 (55) | 46 (61) | 11 (39) | 6 (43) | 5 (36) | 2 (25) | 2 (29) |
Age | ||||||||
 40–54 | 129 (29) | 108 (32) | 13 (17) | 8 (29) | 5 (36) | 3 (21) | 0 (0) | 0 (0) |
 55–64 | 125 (28) | 99 (29) | 16 (21) | 10 (36) | 6 (43) | 4 (29) | 4 (50) | 2 (29) |
 65+ | 188 (43) | 131 (39) | 47 (62) | 10 (36) | 3 (21) | 7 (50) | 4 (50) | 5 (71) |
Age, males | ||||||||
 40–54 | 64 (32) | 52 (34) | 6 (20) | 6 (35) | 4 (50) | 2 (22) | 0 (0) | 0 (0) |
 55–64 | 61 (31) | 47 (31) | 7 (23) | 7 (41) | 4 (50) | 3 (33) | 3 (50) | 2 (40) |
 65+ | 74 (37) | 53 (35) | 17 (57) | 4 (24) | 0 (0) | 4 (44) | 3 (50) | 3 (60) |
Age, females | ||||||||
 40–54 | 65 (27) | 56 (30) | 7 (15) | 2 (18) | 1 (17) | 1 (20) | 0 (0) | 0 (0) |
 55–64 | 64 (26) | 52 (28) | 9 (20) | 3 (27) | 2 (33) | 1 (20) | 1 (50) | 0 (0) |
 64+ | 114 (47) | 78 (42) | 30 (65) | 6 (55) | 3 (50) | 3 (60) | 1 (50) | 2 (100) |