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#' Colombia two waves, 0.8-3.7 years: `gcdg_col_lt45m`
#'
#' A dataset with developmental scores at the item level for
#' 707 unique children measured at two time points.
#'
#' The combination of `subjid` and `agedays` identifies each unique visit (row).
#'
#' Instruments: Bayley III (`by3`).
#'
#' @docType data
#' @format A `data.frame` with 1335 rows and 269 variables:
#'
#'|Name |Type |Label |
#'|:-----------|:----|:-------------------------------------------------------|
#'| `ctrcd` | chr | Country code (ISO 3166-1 alpha-3) |
#'| `cohort` | chr | Cohort name |
#'| `cohortn` | chr | Cohort number |
#'| `subjid` | int | Child number |
#'| `agedays` | int | Age (days) |
#'| `sex` | chr | Either `"male"` or `"female"` |
#'| `gagebrth` | int | Gestational age (days) |
#' |`by3cgd022` |0/1 |Mirror Image Series: Responds positively |
#' |`by3cgd023` |0/1 |Plays with string |
#' |`by3cgd024` |0/1 |Bangs in play |
#' |`by3cgd025` |0/1 |Searches for fallen object |
#' |`by3cgd026` |0/1 |Bell Series: Manipulates |
#' |`by3cgd027` |0/1 |Picks Up Block Series: Reaches for second block |
#' |`by3cgd028` |0/1 |Pulls cloth to obtain object |
#' |`by3cgd029` |0/1 |Pulls string adaptively |
#' |`by3cgd030` |0/1 |Retains both blocks |
#' |`by3cgd031` |0/1 |Bell Series: Rings purposely |
#' |`by3cgd032` |0/1 |Looks at pictures |
#' |`by3cgd033` |0/1 |Picks Up Block Series: Retains 2 of 3 blocks |
#' |`by3cgd034` |0/1 |Searches for missing objects |
#' |`by3cgd035` |0/1 |Takes blocks out of cup |
#' |`by3cgd036` |0/1 |Block Series: 1 Block |
#' |`by3cgd037` |0/1 |Picks up Block Series: 3 blocks |
#' |`by3cgd038` |0/1 |Explores holes in pegboard |
#' |`by3cgd039` |0/1 |Pushes car |
#' |`by3cgd040` |0/1 |Finds hidden object |
#' |`by3cgd041` |0/1 |Suspends ring |
#' |`by3cgd042` |0/1 |Removes pellet |
#' |`by3cgd043` |0/1 |Clear Box: Front |
#' |`by3cgd044` |0/1 |Squeezes object |
#' |`by3cgd045` |0/1 |Finds hidden object (Reversed) |
#' |`by3cgd046` |0/1 |Removes lid from bottle |
#' |`by3cgd047` |0/1 |Pegboard Series: 2 holes |
#' |`by3cgd048` |0/1 |Relational Play Series: Self |
#' |`by3cgd049` |0/1 |Pink Board Series: 1 piece |
#' |`by3cgd050` |0/1 |Finds hidden object (Visible Displacement) |
#' |`by3cgd051` |0/1 |Blue Board Series: 1 piece |
#' |`by3cgd052` |0/1 |Clear Box: Sides |
#' |`by3cgd053` |0/1 |Relational Play Series: Others |
#' |`by3cgd054` |0/1 |Block Series: 9 Blocks |
#' |`by3cgd055` |0/1 |Pegboard Series: 6 Pegs |
#' |`by3cgd056` |0/1 |Pink Board Series: Completes |
#' |`by3cgd057` |0/1 |Uses pencil to obtain object |
#' |`by3cgd058` |0/1 |Blue Board Series: 4 Pieces |
#' |`by3cgd059` |0/1 |Attends to story |
#' |`by3cgd060` |0/1 |Rotated pink board |
#' |`by3cgd061` |0/1 |Object assembly (Ball) |
#' |`by3cgd062` |0/1 |Completes Pegboard: 25 Seconds |
#' |`by3cgd063` |0/1 |Object assembly (Ice Cream Cone) |
#' |`by3cgd064` |0/1 |Matches pictures |
#' |`by3cgd065` |0/1 |Representational play |
#' |`by3cgd066` |0/1 |Blue Board Series: Completes (75 seconds) |
#' |`by3cgd067` |0/1 |Imitates a two-step action. |
#' |`by3cgd068` |0/1 |Matches 3 colors |
#' |`by3cgd069` |0/1 |Imaginary play |
#' |`by3cgd070` |0/1 |Understands concept of one |
#' |`by3cgd071` |0/1 |Multischeme combination play |
#' |`by3cgd072` |0/1 |Concept Grouping: colour |
#' |`by3cgd073` |0/1 |Concept Grouping: Size |
#' |`by3cgd074` |0/1 |Compares masses |
#' |`by3cgd075` |0/1 |Matches size |
#' |`by3cgd076` |0/1 |Discriminates pictures |
#' |`by3cgd077` |0/1 |Simple pattern |
#' |`by3cgd078` |0/1 |Sorts pegs by colour |
#' |`by3cgd079` |0/1 |Counts (One-to-one correspondence) |
#' |`by3cgd080` |0/1 |Discriminates size |
#' |`by3cgd081` |0/1 |Identifies 3 incomplete pictures |
#' |`by3cgd082` |0/1 |Object assembly (Dog) |
#' |`by3cgd083` |0/1 |Discriminates patterns |
#' |`by3cgd084` |0/1 |Spatial memory |
#' |`by3cgd085` |0/1 |Counts (Cardinally) |
#' |`by3cgd086` |0/1 |Number constancy |
#' |`by3cgd087` |0/1 |Laces card |
#' |`by3cgd088` |0/1 |Classifies objects |
#' |`by3cgd089` |0/1 |Understands concept of more |
#' |`by3exd003` |0/1 |Vocalizes mood |
#' |`by3exd005` |0/1 |Social vocalization or laughing |
#' |`by3exd006` |0/1 |2 Vowel sounds |
#' |`by3exd007` |0/1 |Gets attention |
#' |`by3exd008` |0/1 |2 Consonant sounds |
#' |`by3exd009` |0/1 |Uses gestures |
#' |`by3exd010` |0/1 |Consonant-Vowel Combination Series: 1 Combination |
#' |`by3exd011` |0/1 |Participates in play routine |
#' |`by3exd012` |0/1 |Jabbers expressively |
#' |`by3exd013` |0/1 |Consonant-Vowel Combination Series: 4 Combination |
#' |`by3exd014` |0/1 |Uses one-word approximations |
#' |`by3exd015` |0/1 |Directs attention of other |
#' |`by3exd016` |0/1 |Imitates word |
#' |`by3exd017` |0/1 |Initiates play interaction |
#' |`by3exd018` |0/1 |Uses Words Appropriately Series: 2 words |
#' |`by3exd019` |0/1 |Uses word to make wants known |
#' |`by3exd020` |0/1 |Names Object Series: 1 Object |
#' |`by3exd021` |0/1 |Combines word and gesture |
#' |`by3exd022` |0/1 |Names Picture Series: 1 Picture |
#' |`by3exd023` |0/1 |Uses Words Appropriately Series: 8 words |
#' |`by3exd024` |0/1 |Answers yes or no verbally in response to questions |
#' |`by3exd025` |0/1 |Imitates a two-word utterance |
#' |`by3exd026` |0/1 |Uses a two-word utterance |
#' |`by3exd027` |0/1 |Names Object Series: 3 Object |
#' |`by3exd028` |0/1 |Names Picture Series: 5 Pictures |
#' |`by3exd029` |0/1 |Uses multiple-word utterances |
#' |`by3exd030` |0/1 |Uses pronouns |
#' |`by3exd031` |0/1 |Names Action Picture Series: 1 Picture |
#' |`by3exd032` |0/1 |Poses multiple-word questions |
#' |`by3exd033` |0/1 |Makes a contingent utterance |
#' |`by3exd034` |0/1 |Uses verb +ing |
#' |`by3exd035` |0/1 |Names Action Picture Series: 3 Pictures |
#' |`by3exd036` |0/1 |Uses different word combinations |
#' |`by3exd037` |0/1 |Names Action Picture Series: 5 Pictures |
#' |`by3exd038` |0/1 |Uses plurals |
#' |`by3exd039` |0/1 |Answers what or where questions |
#' |`by3exd040` |0/1 |Uses possessives |
#' |`by3exd041` |0/1 |Names 4 colours |
#' |`by3exd042` |0/1 |Answers questions logically (Related to functions) |
#' |`by3exd043` |0/1 |Tells how an object is used |
#' |`by3exd044` |0/1 |Uses prepositions |
#' |`by3exd045` |0/1 |Uses present progressive form |
#' |`by3exd046` |0/1 |Describes Pictures Series: Uses 4-5 word sentences |
#' |`by3exd047` |0/1 |Describes Pictures Series: Uses past tense |
#' |`by3exd048` |0/1 |Describes Pictures Series: Uses future tense |
#' |`by3fmd016` |0/1 |Reaches unilaterally |
#' |`by3fmd017` |0/1 |Food Pellet Series: Raking grasp |
#' |`by3fmd018` |0/1 |Block Series: Partial thumb opposition |
#' |`by3fmd019` |0/1 |Transfers ring |
#' |`by3fmd020` |0/1 |Food Pellet Series: Whole hand grasp |
#' |`by3fmd021` |0/1 |Transfers block |
#' |`by3fmd022` |0/1 |Block Series: Thumb-fingertip grasp |
#' |`by3fmd023` |0/1 |Brings spoons or blocks to midline |
#' |`by3fmd024` |0/1 |Food Pellet Series: Partial thumb opposition |
#' |`by3fmd025` |0/1 |Lifts cup by the handle |
#' |`by3fmd026` |0/1 |Food Pellet Series: Thumb-fingertip grasp |
#' |`by3fmd027` |0/1 |Turns pages of books |
#' |`by3fmd028` |0/1 |Grasp series: Palmar grasp |
#' |`by3fmd029` |0/1 |Isolates extended ring finger |
#' |`by3fmd030` |0/1 |Scribbles spontaneously |
#' |`by3fmd031` |0/1 |Block Stacking Series: 2 blocks |
#' |`by3fmd032` |0/1 |Imitates Stroke Series: Random |
#' |`by3fmd033` |0/1 |Places 10 pellets in bottle (60 seconds) |
#' |`by3fmd034` |0/1 |Grasp series: Transitional grasp |
#' |`by3fmd035` |0/1 |Coins in slot |
#' |`by3fmd036` |0/1 |Connecting Blocks: Apart |
#' |`by3fmd037` |0/1 |Grasp Series: Intermediate (Tripod) grasp |
#' |`by3fmd038` |0/1 |Block stacking Series: 6 blocks |
#' |`by3fmd039` |0/1 |Uses hand to hold paper in place |
#' |`by3fmd040` |0/1 |Imitates Strokes Series: Horizontal |
#' |`by3fmd041` |0/1 |Imitates Strokes Series: Vertical |
#' |`by3fmd042` |0/1 |Connecting Blocks: Together |
#' |`by3fmd043` |0/1 |Imitates Strokes Series: Circular |
#' |`by3fmd044` |0/1 |Builds train of blocks |
#' |`by3fmd045` |0/1 |Strings 3 blocks |
#' |`by3fmd046` |0/1 |Imitates hand movements |
#' |`by3fmd047` |0/1 |Snips paper |
#' |`by3fmd048` |0/1 |Grasp Series: Dynamic grasp |
#' |`by3fmd049` |0/1 |Tactilely discriminates shapes |
#' |`by3fmd050` |0/1 |Builds wall |
#' |`by3fmd051` |0/1 |Cuts paper |
#' |`by3fmd052` |0/1 |Builds bridge |
#' |`by3fmd053` |0/1 |Imitates plus sign |
#' |`by3fmd054` |0/1 |Block stacking Series: 8 blocks |
#' |`by3fmd055` |0/1 |Cuts on line |
#' |`by3fmd056` |0/1 |Builds T |
#' |`by3fmd057` |0/1 |Buttons 1 button |
#' |`by3fmd058` |0/1 |Builds steps |
#' |`by3fmd059` |0/1 |Traces designs |
#' |`by3fmd060` |0/1 |Imitates square |
#' |`by3fmd061` |0/1 |Copies plus sign |
#' |`by3fmd062` |0/1 |Tapbs fingers |
#' |`by3fmd063` |0/1 |Places 20 pellets in bottle |
#' |`by3fmd064` |0/1 |Cuts circle |
#' |`by3fmd065` |0/1 |Cuts square |
#' |`by3fmd066` |0/1 |Copies square |
#' |`by3gmd019` |0/1 |Sits with Support Series: 30 seconds |
#' |`by3gmd020` |0/1 |Rolls from back to sides |
#' |`by3gmd021` |0/1 |Elevates Trunk while Prone Series: Extended arms |
#' |`by3gmd022` |0/1 |Sits with Support Series: 5 seconds |
#' |`by3gmd023` |0/1 |Pulls up to sit |
#' |`by3gmd024` |0/1 |Grasps foot with hands |
#' |`by3gmd025` |0/1 |Rolls from back to stomach |
#' |`by3gmd026` |0/1 |Sits without Support Series: 30 seconds |
#' |`by3gmd027` |0/1 |Sits without support and holds objects |
#' |`by3gmd028` |0/1 |Rotates trunk while seated |
#' |`by3gmd029` |0/1 |Makes stepping movements |
#' |`by3gmd030` |0/1 |Crawls Series: On stomach |
#' |`by3gmd031` |0/1 |Crawls Series: Crawl position |
#' |`by3gmd032` |0/1 |Moves from sitting to hands and knees |
#' |`by3gmd033` |0/1 |Supports weight |
#' |`by3gmd034` |0/1 |Crawls Series: Crawl movement |
#' |`by3gmd035` |0/1 |Raises self to standing position |
#' |`by3gmd036` |0/1 |Bounces while standing |
#' |`by3gmd037` |0/1 |Walks Series: With support |
#' |`by3gmd038` |0/1 |Walks sideways with support |
#' |`by3gmd039` |0/1 |Sits down with control |
#' |`by3gmd040` |0/1 |Stands alone |
#' |`by3gmd041` |0/1 |Stands up Series: Alone |
#' |`by3gmd042` |0/1 |Walks Series: Alone |
#' |`by3gmd043` |0/1 |Walks Series: Alone with coordination |
#' |`by3gmd044` |0/1 |Throws ball |
#' |`by3gmd045` |0/1 |Squats without support |
#' |`by3gmd046` |0/1 |Stands up Series: Mature |
#' |`by3gmd047` |0/1 |Walks Up Stairs Series: Both feet on each step, with support |
#' |`by3gmd048` |0/1 |Walks backward 2 steps |
#' |`by3gmd049` |0/1 |Walks Down Stairs Series: Both feet on each step, with suppo |
#' |`by3gmd050` |0/1 |Runs with coordination |
#' |`by3gmd051` |0/1 |Balances on Right Foot Series: With support |
#' |`by3gmd052` |0/1 |Balances on Left Foot Series: With support |
#' |`by3gmd053` |0/1 |Walks sideways without support |
#' |`by3gmd054` |0/1 |Jumps from bottom step |
#' |`by3gmd055` |0/1 |Kicks ball |
#' |`by3gmd056` |0/1 |Walks forward on path |
#' |`by3gmd057` |0/1 |Walks Up Stairs Series: Both feet on each step, alone. |
#' |`by3gmd058` |0/1 |Walks Down Stairs Series: Both feet on each step, alone |
#' |`by3gmd059` |0/1 |Jumps Forward Series: 4 inches |
#' |`by3gmd060` |0/1 |Balances on right Foot Series: 2 seconds, alone |
#' |`by3gmd061` |0/1 |Balances on Left Foot Series: 2 seconds, alone |
#' |`by3gmd062` |0/1 |Walks on tiptoes 4 steps |
#' |`by3gmd063` |0/1 |Walks backward close to path |
#' |`by3gmd064` |0/1 |Walks Up Stairs Series: Alternating feet, alone |
#' |`by3gmd065` |0/1 |Imitates postures |
#' |`by3gmd066` |0/1 |Stops from a full run |
#' |`by3gmd067` |0/1 |Walks Down Stairs Series: Alternating feet, alone |
#' |`by3gmd068` |0/1 |Hops 5 feet |
#' |`by3gmd069` |0/1 |Balances on Right Foot Series: 8 seconds, alone |
#' |`by3gmd070` |0/1 |Balances on Left Foot Series: 8 seconds, alone |
#' |`by3gmd071` |0/1 |Walks heel to toe |
#' |`by3gmd072` |0/1 |Jumps Forward Series: 24 inches |
#' |`by3red006` |0/1 |Searches with head turn |
#' |`by3red007` |0/1 |Discriminates sounds |
#' |`by3red008` |0/1 |Sustained play with objects |
#' |`by3red009` |0/1 |Responds to name |
#' |`by3red010` |0/1 |Interrupts activity |
#' |`by3red011` |0/1 |Recognizes 2 familiar words |
#' |`by3red012` |0/1 |Responds to no-no |
#' |`by3red013` |0/1 |Attends to other's play routine |
#' |`by3red014` |0/1 |Responds to request for social routines |
#' |`by3red015` |0/1 |Identifies Object Series: 1 correct |
#' |`by3red016` |0/1 |Identifies object in the environment |
#' |`by3red017` |0/1 |Identifies Picture Series: 1 correct |
#' |`by3red018` |0/1 |Understands inhibitory words |
#' |`by3red019` |0/1 |Identifies Object Series: 3 correct |
#' |`by3red020` |0/1 |Follows one-part directions |
#' |`by3red021` |0/1 |Identifies Picture Series: 3 Correct |
#' |`by3red022` |0/1 |Identifies 3 clothing items |
#' |`by3red023` |0/1 |Identifies Action Picture Series: 1 correct |
#' |`by3red024` |0/1 |Identifies 5 parts of the body |
#' |`by3red025` |0/1 |Follows two-part directions |
#' |`by3red026` |0/1 |Identifies Action Picture Series: 3 correct |
#' |`by3red027` |0/1 |Understands use of objects |
#' |`by3red028` |0/1 |Understands part/whole relationships |
#' |`by3red029` |0/1 |Identifies Action Picture Series: 5 correct |
#' |`by3red030` |0/1 |Understands pronouns (him, me, my, you, your) |
#' |`by3red031` |0/1 |Understands labels for sizes |
#' |`by3red032` |0/1 |Understands Preposition Series: 2 correct |
#' |`by3red033` |0/1 |Understands possessives |
#' |`by3red034` |0/1 |Understands verb +ing |
#' |`by3red035` |0/1 |Identifies colours |
#' |`by3red036` |0/1 |Understands label of one |
#' |`by3red037` |0/1 |Understands pronouns (they, he, she) |
#' |`by3red038` |0/1 |Understands pronouns (his, her) |
#' |`by3red039` |0/1 |Understands plurals |
#' |`by3red040` |0/1 |Understands more |
#' |`by3red041` |0/1 |Understands most |
#' |`by3red042` |0/1 |Understands Preposition Series: 4 correct |
#' |`by3red043` |0/1 |Understands negatives in sentences |
#' |`by3red044` |0/1 |Understands past tense |
#' |`by3red045` |0/1 |Understands labels for mass |
#' |`by3red046` |0/1 |Understands least |
#' |`by3red047` |0/1 |Understands less |
#' |`by3red048` |0/1 |Understands descriptive labels |
#' |`by3red049` |0/1 |Identifies categories of objects |
#'
#' @references
#' Attanasio OP, Fernández C, Fitzsimons EOA, Grantham-McGregor SM, Meghir C,
#' Rubio-Codina M. Using the infrastructure of a conditional cash transfer
#' program to deliver a scalable integrated early child development program in
#' Colombia: cluster randomized controlled trial. BMJ. 2014;349.
#' @examples
#' head(gcdg_col_lt45m)
"gcdg_col_lt45m"
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