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. 2023 Nov 24;8:386. Originally published 2023 Sep 1. [Version 3] doi: 10.12688/wellcomeopenres.19774.3

Table 13. Original and derived G1 menstrual pain variables (N (%)).

Question 8.1 years 9.6 years 10.6 years 11.6 years 13.1 years 14.6 years 15.5 years 16 years 17 years 21 years
Original variables
Has your daughter ever had any of the following symptoms associated with her period: severe cramps?
Yes <5 5 (33.33) 10 (15.87) 126 (26.30) 563 (32.13) - - - - -
No <5 10 (66.67) 53 (84.13) 353 (73.70) 1189 (67.87) - - - - -
Have you ever had any of the following symptoms associated with your period: severe cramps?
Yes - - - - - 1271 (48.85) - 1515 (56.32) 1451 (57.92) -
No - - - - - 1331 (51.15) - 1175 (43.68) 1054 (42.08) -
Have you ever had any of the following symptoms associated with your period: pain with your period?
Yes - - - - - - 2108 (85.10) - - -
No - - - - - - 369 (14.90) - - -
If so, were they mild, moderate, or severe?
Severe - - - - - - 405 (19.33) - - -
Moderate - - - - - - 1114 (53.17) - - -
Mild - - - - - - 576 (27.49) - - -
If yes, did you contact a doctor for this?
Yes <5 <5 <5 14 (11.20) 49 (8.81) 148 (11.75) 194 (9.29) 327 (21.61) 371 (25.76) -
No <5 <5 6 (NA) 111 (88.80) 507 (91.19) 1112 (88.25) 1894 (90.71) 1186 (78.39) 1069 (74.24) -
How painful are/were your periods?
Very - - - - - - - - - 327 (15.60)
Moderately - - - - - - - - - 686 (32.73)
Mildly - - - - - - - - - 785 (37.45)
Not at all - - - - - - - - - 298 (14.22)
Derived variables
Painful * <5 <5 10 (15.87) 126 (26.30) 563 (32.13) 1271 (48.85) 1519 (61.65) 1515 (56.32) 1451 (57.92) 1013 (48.33)
Not painful * <5 10 (NA) 53 (84.13) 353 (73.70) 1189 (67.87) 1331 (51.15) 945 (38.35) 1175 (43.68) 1054 (42.08) 1083 (51.67)

Cell counts below 5 have been replaced with <5, and this may include 0.

*Painful periods are defined as reporting ‘severe cramps’, ‘severe/moderate pain with your period’, or ‘very/moderately’ painful periods, whereas not painful is defined as reporting ‘no severe cramps’, ‘mild/no pain with your period’, or periods that are ‘mildly/not at all’ painful.