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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)
  1. Absolute numbers and percentages are provided