TABLE 1.

Comparison of Child, Family, and Parent Characteristics Between Pre-CLT and Post-CLT Eras

Pre-CLT GroupPost-CLT GroupDifference*P Value*
Characteristics of the child, % (n) of families
    Age, y (mean ± SD)2.48 ± 1.782.11 ± 1.67t = 1.13.26
    Severity of visual loss
        Severe29 (22)23 (16)6 (−8 to 20).42
        Moderate39 (32)37 (25)2 (−1 to 19).84
        Mild32 (25)40 (27)8 (−8 to 23).31
    Associated nonophthalmic disorders
        Absent49 (38)60 (41)11 (−5 to 27).19
        Present51 (41)40 (27)
Characteristics of the family, % (n) of families
    History of family visual impairment
        Yes24 (17)13 (7)11 (−1 to 23).09
        No76 (53)87 (48)
    Family type
        Single-parent87 (67)90 (61)3 (−7 to 13).62
        Two-parent13 (10)10 (7)
    Deprivation index (population quintiles)24
        Quintiles 1, 2, and 368 (32)69 (29)1 (−19 to 18).82
        Quintiles 4 and 532 (15)31 (13)
    Car ownership22
        None14 (7)10 (7)4 (−6 to 14).23
        143 (21)51 (34)8 (−8 to 24).37
        ≥243 (21)39 (26)4 (−12 to 20).49
    Housing22
        Owned75 (58)78 (53)3 (−16 to 10).69
        Rented25 (19)22 (15)
Characteristics of the parent, % (n) parents
    Age, y (mean ± SD)33.6 ± 5.333.8 ± 5.0t = .28.78
    Main language
        English97 (112)99 (81)2 (−2 to 6).31
        Other3 (3)1 (1)
    Ethnic group21
        White90 (103)83 (78)7 (−2 to 16).16
        All others10 (12)17 (12)
    Occupation23
        Professional26 (29)28 (24)2 (−14 to 10).76
        Intermediate35 (40)16 (14)19 (7 to 30).002
        Working12 (14)19 (16)7 (−3 to 16).19
        Other27 (31)37 (31)10 (−3 to 22).13
    Education22
        Up to compulsory33 (34)18 (16)15 (3 to 27).001
        A levels or equivalent31 (33)43 (38)12 (−1 to 25).07
        Degree36 (38)39 (34)3 (−10 to 16).69
  • * t test for difference in means or test for difference in 2 proportions (95% confidence interval), as appropriate.

  • Incomplete data for some items; maximal denominators were 79 families for the pre-CLT group and 68 families for the post-CLT group.

  • Incomplete data for some items; maximal denominators were 115 parents for the pre-CLT group and 96 parents for the post-CLT group.