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Table 1 Demographic characteristics of participants in the cohort and those lost to follow up

From: Analysis of reasons for loss to follow up in a prospective study in Chandigarh, India and impact from telecom changes

  Whole cohort (col. %) Retained (row %) Pa Lost to follow up (n  = 230, 56%)
Not interested (row %) Moved away (row %) Phone disconnected (row %) Other reasonb (row %)
Overall 413 183 (44%)   35 (8%) 54 (13%) 27 (7%) 114 (28%)
Child’s sex    0.402     
 Male 202 (48%) 95 (47%)   17 (8%) 25 (12%) 12 (6%) 53 (26%)
 Female 211 (50%) 88 (42%)   18 (9%) 29 (14%) 15 (7%) 61 (29%)
Mother’s age    0.749     
 18–24 years 105 (25%) 49 (47%)   7 (7%) 21 (20%) 3 (3%) 25 (24%)
 25–29 years 181 (43%) 81 (45%)   16 (9%) 26 (14%) 12 (7%) 46 (25%)
 30–42 years 127 (30%) 53 (42%)   12 (9%) 7 (6%) 12 (9%) 43 (34%)
Caste    0.015     
 Scheduled caste/scheduled tribe 85 (20%) 46 (54%)   9 (11%) 6 (7%) 4 (5%) 20 (24%)
 Other backward caste 54 (13%) 28 (52%)   2 (4%) 4 (7%) 4 (7%) 16 (30%)
 Other 274 (65%) 109 (40%)   24 (9%) 44 (16%) 19 (7%) 78 (28%)
Religion    0.246     
 Not Hindu 73 (17%) 37 (51%)   3 (4%) 3 (4%) 3 (4%) 27 (37%)
 Hindu 340 (81%) 146 (43%)   32 (9%) 51 (15%) 24 (7%) 87 (26%)
Monthly income    0.563     
 < 10,000 INR 186 (44%) 89 (48%)   11 (6%) 24 (13%) 11 (6%) 51 (27%)
 10,000–24,999 INR 121 (29%) 52 (43%)   9 (7%) 19 (16%) 8 (7%) 33 (27%)
 25,000–49,000 INR 82 (19%) 34 (41%)   10 (12%) 9 (11%) 7 (9%) 22 (27%)
 ≥ 50,000 INR 24 (6%) 8 (33%)   5 (21%) 2 (8%) 1 (4%) 8 (33%)
  1. aRao-Scott chi-square test comparing those retained versus those lost to follow up
  2. b“Other reason” included 107 participants who were not reachable, 2 who had died, and 5 who were out of town on the follow-up date