Millennium Cohort Study (MCS) Datasets#
Last modified: 28 Jul 2025
1. Datasets#
Table 1: Datasets and metrics in the UK LLC belonging to MCS.
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| Dataset | Dataset Name | # Participants | # Observations | # Variables |
|---|---|---|---|---|
| mcs_longitudinal_family_file | MCS Longitudinal Family File | 58699 | 49 | |
| mcs7_parent_interview | MCS7 Parent Interview | 10468 | 12679 | 281 |
| mcs7_parent_derived | MCS7 Parent Derived | 10468 | 12679 | 17 |
| mcs7_parent_cm_interview | MCS7 Parent Interview about Cohort Member | 12001 | 14940 | 58 |
| mcs7_hhgrid | MCS7 Household Grid | 15346 | 22458 | 67 |
| mcs7_family_interview | MCS7 Family Interview | 33159 | 114 | |
| mcs7_family_derived | MCS7 Family Derived | 33852 | 21 | |
| mcs7_cm_interview | MCS7 Cohort Member Interview | 9451 | 10345 | 795 |
| mcs7_cm_derived | MCS7 Cohort Member Derived | 9493 | 10952 | 33 |
| mcs7_cm_cognitive_assessment | MCS7 Cohort Member Cognitive Assessment | 9046 | 9540 | 19 |
| mcs6_proxy_partner_interview | MCS6 Proxy Partner Interview | 150 | 334 | 310 |
| mcs6_parent_interview | MCS6 Parent Interview | 14295 | 18854 | 1048 |
| mcs6_parent_assessment | MCS6 Parent Assessment | 14295 | 18854 | 85 |
| mcs4_cm_aspirations | MCS4 Cohort Member Aspirations | 8886 | 14013 | 36 |
| mcs3_proxy_partner_interview | MCS3 Proxy Partner Interview | 88 | 287 | 65 |
| mcs3_parent_derived | MCS3 Parent Derived | 17369 | 27443 | 92 |
| mcs3_parent_cm_interview | MCS3 Parent Interview about Cohort Member | 16953 | 26005 | 686 |
| mcs3_older_siblings_questionnaire | MCS3 Older Siblings Questionnaire | 26869 | 47093 | 145 |
| mcs3_hhgrid | MCS3 Household Grid | 26559 | 44927 | 61 |
| mcs3_family_derived | MCS3 Family Derived | 47093 | 46 | |
| mcs3_cm_teacher_survey | MCS4 Cohort Member Teacher Survey | 9108 | 15431 | 145 |
| mcs3_cm_interview | MCS3 Cohort Member Interview | 9108 | 15431 | 115 |
| mcs3_cm_derived | MCS3 Cohort Member Derived | 9108 | 15431 | 18 |
| mcs3_cm_cognitive_assessment | MCS3 Cohort Member Cognitive Assessment | 9108 | 15431 | 343 |
| mcs2_proxy_partner_interview | MCS2 Proxy Partner Interview | 84 | 223 | 109 |
| mcs2_parent_interview | MCS2 Parent Interview | 15698 | 25907 | 969 |
| mcs2_parent_derived | MCS2 Parent Derived | 16557 | 28422 | 38 |
| mcs2_parent_cm_interview | MCS2 Parent Interview about Cohort Member | 15698 | 26243 | 457 |
| mcs2_older_siblings_questionnaire | MCS2 Older Siblings Questionnaire | 25985 | 47991 | 474 |
| mcs2_neighbourhood_observations | MCS2 Neighbourhood Observations | 25985 | 47991 | 20 |
| mcs2_hhgrid | MCS2 Household Grid | 25489 | 45339 | 42 |
| mcs2_family_derived | MCS2 Family Derived | 47991 | 59 | |
| mcs2_cm_interview | MCS2 Cohort Member Interview | 8867 | 15778 | 58 |
| mcs2_cm_derived | MCS2 Cohort Member Derived | 8867 | 15778 | 31 |
| mcs4_cm_cognitive_assessment | MCS4 Cohort Member Cognitive Assessment | 8889 | 14013 | 504 |
| mcs6_parent_cm_interview | MCS6 Parent Interview about Cohort Member | 14295 | 19070 | 408 |
| mcs4_cm_derived | MCS4 Cohort Member Derived | 8889 | 14013 | 26 |
| mcs4_cm_teacher_survey | MCS4 Cohort Member Teacher Survey | 8889 | 14013 | 177 |
| mcs6_hhgrid | MCS6 Household Grid | 16061 | 24377 | 56 |
| mcs6_family_derived | MCS6 Family Derived | 36571 | 33 | |
| mcs6_cm_interview | MCS6 Cohort Member Interview | 8945 | 11859 | 414 |
| mcs6_cm_derived | MCS6 Cohort Member Derived | 8945 | 11859 | 43 |
| mcs6_cm_cognitive_assessment | MCS6 Cohort Member Cognitive Assessment | 8945 | 11859 | 77 |
| mcs5_proxy_partner_interview | MCS5 Proxy Partner Interview | 42 | 119 | 153 |
| mcs5_parent_interview | MCS5 Parent Interview | 15927 | 22044 | 999 |
| mcs5_parent_derived | MCS5 Parent Derived | 16332 | 23422 | 29 |
| mcs5_parent_cm_interview | MCS5 Parent Interview about Cohort Member | 15927 | 22309 | 856 |
| mcs5_hhgrid | MCS5 Household Grid | 26214 | 40429 | 63 |
| mcs5_family_derived | MCS5 Family Derived | 41301 | 35 | |
| mcs5_cm_teacher_survey | MCS5 Cohort Member Teacher Survey | 9149 | 13447 | 216 |
| mcs5_cm_interview | MCS5 Cohort Member Interview | 9149 | 13447 | 331 |
| mcs5_cm_derived | MCS5 Cohort Member Derived | 9149 | 13447 | 22 |
| mcs5_cm_cognitive_assessment | MCS5 Cohort Member Cognitive Assessment | 9149 | 13447 | 206 |
| mcs4_proxy_partner_interview | MCS4 Proxy Partner Interview | 23 | 249 | 127 |
| mcs4_parent_interview | MCS4 Parent Interview | 17926 | 22956 | 1282 |
| mcs4_parent_derived | MCS4 Parent Derived | 18049 | 24771 | 96 |
| mcs4_parent_cm_interview | MCS4 Parent Interview about Cohort Member | 17931 | 23243 | 1097 |
| mcs4_hhgrid | MCS4 Household Grid | 26962 | 41344 | 63 |
| mcs4_family_derived | MCS4 Family Derived | 42905 | 50 | |
| mcs4_cm_interview | MCS4 Cohort Member Interview | 8889 | 14013 | 186 |
| mcs2_cm_cognitive_assessment | MCS2 Cohort Member Cognitive Assessment | 8867 | 15778 | 586 |
| mcs1_proxy_partner_interview | MCS1 Proxy Partner Interview | 46 | 216 | 70 |
| mcs6_parent_derived | MCS6 Parent Derived | 14970 | 20550 | 39 |
| mcs1_parent_derived | MCS1 Parent Derived | 16925 | 33884 | 41 |
| mcs1_parent_interview | MCS1 Parent Interview | 16473 | 31734 | 666 |
| COVID_CM_w1 | COVID-19 Survey Wave 1 - MCS Cohort Members | 2542 | 2640 | 304 |
| mcs1_parent_cm_interview | MCS1 Parent Interview about Cohort Member | 16473 | 32165 | 178 |
| mcs1_hhgrid | MCS1 Household Grid | 26217 | 52738 | 35 |
| mcs1_family_derived | MCS1 Family Derived | 56598 | 53 | |
| mcs1_cm_interview | MCS1 Cohort Member Interview | 9274 | 18786 | 6 |
| mcs1_cm_derived | MCS1 Cohort Member Derived | 9277 | 18786 | 17 |
| basic_demographic_parent | Basic demographic variables - MCS Parent respondents | 18127 | 37705 | 24 |
| basic_demographic_hhgrid | Basic demographic variables - MCS Cohort Members and respondents | 27866 | 57266 | 21 |
| basic_demographic_family | Basic demographic variables - Family household | 337285 | 9 | |
| basic_demographic_cm | Basic demographic variables MCS Cohort Members | 9610 | 19483 | 14 |
| Covid_19_Serology_Parent | COVID-19 Antibody Testing - MCS Parent Respondents | 6858 | 9791 | 18 |
| Covid_19_Serology_CM | COVID-19 Antibody Testing - MCS Cohort Members | 4590 | 5498 | 18 |
| COVID_w3 | COVID-19 Survey Wave 3 - MCS | 9361 | 9710 | 4132 |
| COVID_w2 | COVID-19 Survey Wave 2 - MCS | 8417 | 8968 | 3897 |
| COVID_w1 | COVID-19 Survey Wave 1 - MCS | 5217 | 5469 | 1512 |
| COVID_parent_w3 | COVID-19 Survey Wave 3 - MCS Parent Respondents | 5023 | 5246 | 828 |
| COVID_parent_w2 | COVID-19 Survey Wave 2 - MCS Parent Respondents | 5310 | 5702 | 781 |
| COVID_CM_w3 | COVID-19 Survey Wave 3 - MCS Cohort Members | 4338 | 4464 | 828 |
| COVID_CM_w2 | COVID-19 Survey Wave 2 - MCS Cohort Members | 3107 | 3266 | 781 |
| COVID_parent_w1 | COVID-19 Survey Wave 1 - MCS Parent Respondents | 2675 | 2829 | 304 |