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Table 3 Characteristics of the study children at age 13 years in comparison to excluded children at age 13 years (with no pet ownership data due to non-response)

From: Socio-demographic factors associated with pet ownership amongst adolescents from a UK birth cohort

Variable Level Excluded Study Children
(n = 4120)
Included study children
(n = 2332)
Number (%) Number (%)
Gender Male 2383 (58) 751 (32)
Female 1737 (42) 1580 (68)
Ethnicity White 2710 (97) 1868 (97)
Non-white 78 (3) 50 (3)
Number of people in household 3 487 (15) 323 (15)
4 1525 (48) 1138 (51)
5+ 1149 (36) 774 (34)
Presence of an older sibling at 18 months Yes 2326 (59) 1140 (51)
No 1599 (41) 1095 (49)
Maternal education CSE or no qualification (lowest) 675 (17) 222 (10)
Vocational 412 (10) 166 (7)
O level 1484 (37) 722 (32)
A level 988 (25) 647 (29)
Degree (highest) 429 (11) 478 (21)
Paternal education CSE or no qualification (lowest) 912 (24) 366 (16)
Vocational 372 (10) 165 (7)
O level 907 (24) 451 (20)
A level 1074 (28) 645 (29)
Degree (highest) 584 (15) 608 (27)
Maternal social class Professional (highest) 167 (5) 189 (9)
Managerial and technical 1069 (32) 814 (36)
Skilled: non-manual 1490 (44) 892 (40)
Skilled: manual 250 (7) 131 (6)
Partly skilled 313 (9) 176 (8)
Unskilled (lowest) 73 (2) 33 (2)
Paternal social class Professional (highest) 350 (10) 344 (15)
Managerial and technical 1202 (33) 839 (38)
Skilled: non-manual 389 (11) 274 (12)
Skilled: manual 1211 (34) 574 (26)
Partly skilled 339 (9) 167 (8)
Unskilled (lowest) 120 (3) 37 (2)
Maternal age at delivery < 21 years 174 (4) 56 (3)
21–30 years 2596 (63) 1292 (58)
> 30 years 1350 (33) 887 (40)
Mother had pets as a child No, not at all 256 (7) 196 (9)
Yes, part of time 1574 (43) 994 (45)
Yes, always 1862 (50) 1045 (47)
House type Detached 1073 (26) 764 (34)
Semi-detached 1586 (39) 801 (36)
End terrace 403 (10) 198 (9)
Terraced 871 (21) 396 (18)
Flat/room in someone else’s house/other 170 (4) 76 (3)