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An "X" indicates the variable is available for the listed sample.
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Variable
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Variable Label
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Type |
24 |
23 |
22 |
21 |
20 |
19 |
18 |
17 |
16 |
15 |
14 |
13 |
12 |
11 |
10 |
09 |
08 |
07 |
06 |
05 |
04 |
03 |
02 |
01 |
00 |
Variable
|
99 |
98 |
97 |
96 |
95 |
94 |
93 |
92 |
91 |
90 |
89 |
88 |
87 |
86 |
85 |
84 |
83 |
82 |
81 |
80 |
79 |
78 |
77 |
76 |
75 |
Variable
|
74 |
73 |
72 |
71 |
70 |
69 |
68 |
67 |
66 |
65 |
64 |
63 |
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| BPRACTRW | Back pain caused by repeated activities at work happened at most-recent-held job, past 12 months | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPRACTRW | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | . | BPRACTRW | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPSCCHG | Has hard time with change | P | X | X | X | X | X | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCCHG | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCCHG | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPSCCLMDWN | Has hard time calming down | P | X | X | X | X | X | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCCLMDWN | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCCLMDWN | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPSCCRYALT | Cries a lot | P | X | X | X | X | X | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCCRYALT | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCCRYALT | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPSCFUSSY | Is fussy or irritable | P | X | X | X | X | X | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCFUSSY | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCFUSSY | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPSCHLOPPL | Minds being held by other people | P | X | X | X | X | X | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCHLOPPL | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCHLOPPL | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPSCMFRT | Is hard to comfort | P | X | X | X | X | X | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCMFRT | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCMFRT | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPSCNWPLCS | Has hard time in new places | P | X | X | X | X | X | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCNWPLCS | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCNWPLCS | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPSCNWPPL | Has hard time being with new people | P | X | X | X | X | X | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCNWPPL | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCNWPPL | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPSCORER1 | Behavior Problem Score: Recode 1 | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCORER1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | BPSCORER1 | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPSCORER2 | Behavior Problem Score: Recode 2 | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCORER2 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | BPSCORER2 | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPSCPRLKSL | Is hard to get enough sleep because of sample child | P | X | X | X | X | X | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCPRLKSL | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCPRLKSL | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPSCPTSLP | Is hard to put to sleep | P | X | X | X | X | X | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCPTSLP | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCPTSLP | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPSCSCHD | Is hard to keep on a schedule or routine | P | X | X | X | X | X | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCSCHD | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCSCHD | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPSCSTYSLP | Has trouble staying asleep | P | X | X | X | X | X | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCSTYSLP | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSCSTYSLP | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPSECRETIV | Behavior Index: Child secretive | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSECRETIV | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | X | . | . | . | . | . | . | BPSECRETIV | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPSOMTRUSUM | Index of behavior problems: Sometimes true | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSOMTRUSUM | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSOMTRUSUM | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPSTOPWK | Ever stopped working or changed job because of back pain | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSTOPWK | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSTOPWK | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPSULLEN | Behavior Index: Child stubborn, sullen, or irritable | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPSULLEN | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | X | . | . | . | . | . | . | BPSULLEN | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPTEMPER | Behavior Index: Child has very strong temper | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPTEMPER | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | X | . | . | . | . | . | . | BPTEMPER | . | . | . | . | . | . | . | . | . | . | . | . | |
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|
Variable
|
Variable Label
|
Type |
24 |
23 |
22 |
21 |
20 |
19 |
18 |
17 |
16 |
15 |
14 |
13 |
12 |
11 |
10 |
09 |
08 |
07 |
06 |
05 |
04 |
03 |
02 |
01 |
00 |
Variable
|
99 |
98 |
97 |
96 |
95 |
94 |
93 |
92 |
91 |
90 |
89 |
88 |
87 |
86 |
85 |
84 |
83 |
82 |
81 |
80 |
79 |
78 |
77 |
76 |
75 |
Variable
|
74 |
73 |
72 |
71 |
70 |
69 |
68 |
67 |
66 |
65 |
64 |
63 |
|
| BPTHIGH | Back pain spread to thighs | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPTHIGH | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | . | BPTHIGH | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPUNLIKID | Behavior Index: Child is not liked by other children | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPUNLIKID | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | X | . | . | . | . | . | . | BPUNLIKID | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPUNLOVED | Behavior Index: Child complains no one loves self | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPUNLOVED | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | X | . | . | . | . | . | . | BPUNLOVED | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPWHEN | Year when first had back pain for at least a week | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPWHEN | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | . | BPWHEN | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPWITHDRAW | Behavior Index: Child withdrawn | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPWITHDRAW | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | X | . | . | . | . | . | . | BPWITHDRAW | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPWKDAYS | Number of work days missed because of back pain, past 12 months | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPWKDAYS | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | . | BPWKDAYS | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPWORRIES | Behavior Index: Child worries too much | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPWORRIES | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | X | . | . | . | . | . | . | BPWORRIES | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPWORTHLES | Behavior Index: Child feels worthless or inferior | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPWORTHLES | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | X | . | . | . | . | . | . | BPWORTHLES | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPWRACT | Locations where repeated activities that caused back pain were performed | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPWRACT | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | . | BPWRACT | . | . | . | . | . | . | . | . | . | . | . | . | |
| BPYRS | Number of years had back pain for at least a week | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BPYRS | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | . | BPYRS | . | . | . | . | . | . | . | . | . | . | . | . | |
| BRACE | Uses brace | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | . | . | BRACE | . | . | . | . | X | X | . | . | . | X | . | . | . | . | . | . | . | . | . | X | X | . | . | . | . | BRACE | . | . | . | . | . | X | . | . | . | . | . | . | |
| BRACEANKLE | Uses ankle brace | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | . | . | BRACEANKLE | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BRACEANKLE | . | . | . | . | . | . | . | . | . | . | . | . | |
| BRACEARM | Uses arm brace | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | . | . | BRACEARM | . | . | . | . | X | X | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BRACEARM | . | . | . | . | . | . | . | . | . | . | . | . | |
| BRACEBACK | Uses back brace | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | . | . | BRACEBACK | . | . | . | . | X | X | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BRACEBACK | . | . | . | . | . | . | . | . | . | . | . | . | |
| BRACEFOOT | Uses foot brace | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BRACEFOOT | . | . | . | . | X | X | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BRACEFOOT | . | . | . | . | . | . | . | . | . | . | . | . | |
| BRACEHAND | Uses hand brace | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BRACEHAND | . | . | . | . | X | X | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BRACEHAND | . | . | . | . | . | . | . | . | . | . | . | . | |
| BRACEKNEE | Uses knee brace | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | . | . | BRACEKNEE | . | . | . | . | X | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BRACEKNEE | . | . | . | . | . | . | . | . | . | . | . | . | |
| BRACELEG | Uses leg brace | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | . | . | BRACELEG | . | . | . | . | X | X | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | X | . | . | BRACELEG | . | . | . | . | . | . | . | . | . | . | . | . | |
| BRACENECK | Uses neck brace | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | . | . | BRACENECK | . | . | . | . | X | X | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BRACENECK | . | . | . | . | . | . | . | . | . | . | . | . | |
| BRACEOTH | Uses other type of brace | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BRACEOTH | . | . | . | . | X | X | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BRACEOTH | . | . | . | . | . | . | . | . | . | . | . | . | |
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|
Variable
|
Variable Label
|
Type |
24 |
23 |
22 |
21 |
20 |
19 |
18 |
17 |
16 |
15 |
14 |
13 |
12 |
11 |
10 |
09 |
08 |
07 |
06 |
05 |
04 |
03 |
02 |
01 |
00 |
Variable
|
99 |
98 |
97 |
96 |
95 |
94 |
93 |
92 |
91 |
90 |
89 |
88 |
87 |
86 |
85 |
84 |
83 |
82 |
81 |
80 |
79 |
78 |
77 |
76 |
75 |
Variable
|
74 |
73 |
72 |
71 |
70 |
69 |
68 |
67 |
66 |
65 |
64 |
63 |
|
| BRACEWRIST | Uses wrist brace | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | . | . | BRACEWRIST | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BRACEWRIST | . | . | . | . | . | . | . | . | . | . | . | . | |
| BRACNLEG | Uses non-leg brace | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BRACNLEG | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | X | . | . | BRACNLEG | . | . | . | . | . | . | . | . | . | . | . | . | |
| BRACNOS | Uses brace, unspecified type | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BRACNOS | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | X | . | . | BRACNOS | . | . | . | . | . | . | . | . | . | . | . | . | |
| BREADMO | Frequency eating whole grain bread, past month | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | BREADMO | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BREADMO | . | . | . | . | . | . | . | . | . | . | . | . | |
| BREADMWK | Frequency eating whole grain bread, past month: Times per week | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | X | BREADMWK | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BREADMWK | . | . | . | . | . | . | . | . | . | . | . | . | |
| BREADNO | Frequency eating bread: number of time units | P | . | . | . | . | . | . | . | . | . | X | . | . | . | . | X | . | . | . | . | . | . | . | . | . | X | BREADNO | . | . | . | . | . | . | . | X | . | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | BREADNO | . | . | . | . | . | . | . | . | . | . | . | . | |
| BREADTP | Frequency eating bread: time period | P | . | . | . | . | . | . | . | . | . | X | . | . | . | . | X | . | . | . | . | . | . | . | . | . | X | BREADTP | . | . | . | . | . | . | . | X | . | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | BREADTP | . | . | . | . | . | . | . | . | . | . | . | . | |
| BREADYR | Recode: frequency eating bread, times per year | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | X | BREADYR | . | . | . | . | . | . | . | X | . | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | BREADYR | . | . | . | . | . | . | . | . | . | . | . | . | |
| BREAKFAST | Frequency eats breakfast | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BREAKFAST | . | . | . | . | . | . | . | . | . | X | . | . | . | . | X | . | X | . | . | . | . | . | X | . | . | BREAKFAST | . | . | . | . | . | . | . | . | . | . | . | . | |
| BREASTMISYRC | Had missing breast, past year (Condition) | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BREASTMISYRC | . | . | . | X | X | X | X | X | X | X | X | X | X | X | X | X | . | . | . | . | . | . | . | . | . | BREASTMISYRC | . | . | . | . | . | . | . | . | . | . | . | . | |
| BREFEV | Child ever breastfed | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BREFEV | . | . | . | . | . | . | . | . | . | X | . | . | . | . | X | . | . | . | X | . | . | . | . | . | . | BREFEV | . | . | . | . | . | . | . | . | . | . | . | . | |
| BREFLCEV | Woman ever breastfed last child | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BREFLCEV | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BREFLCEV | . | . | . | . | . | . | . | . | . | . | . | . | |
| BREFNOW | Now being breastfed | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BREFNOW | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | BREFNOW | . | . | . | . | . | . | . | . | . | . | . | . | |
| BREFONLYLC | Last child ever only fed breastmilk | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BREFONLYLC | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BREFONLYLC | . | . | . | . | . | . | . | . | . | . | . | . | |
| BREFONLYLCGP | Duration last child only fed breastmilk: Grouped months and years | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BREFONLYLCGP | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BREFONLYLCGP | . | . | . | . | . | . | . | . | . | . | . | . | |
| BREFONLYLCNO | Duration last child only fed breastmilk: Number of units | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BREFONLYLCNO | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BREFONLYLCNO | . | . | . | . | . | . | . | . | . | . | . | . | |
| BREFONLYLCTP | Duration last child only fed breastmilk: Time period | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BREFONLYLCTP | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BREFONLYLCTP | . | . | . | . | . | . | . | . | . | . | . | . | |
| BREFONPILL | Biological mother took Pill during breastfeeding | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BREFONPILL | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | BREFONPILL | . | . | . | . | . | . | . | . | . | . | . | . | |
| BREFORMAG | Age breastfed child first fed formula or regular milk | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BREFORMAG | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | BREFORMAG | . | . | . | . | . | . | . | . | . | . | . | . | |
| BREFORMEV | Breastfed child ever given formula or regular milk | P | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | BREFORMEV | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | X | . | . | . | . | . | . | BREFORMEV | . | . | . | . | . | . | . | . | . | . | . | . | |