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Table 1

Description of four articles reporting on five studies on puberty and back pain

Reference number [ 33 ] [ 33 ] [ 35 ] [ 34 ] [ 32 ]
1st authorJansensJansensWedderkoppLeRescheHulsegge
Year20112011200520052011
CountryNetherlandUSADenmarkUSANetherland
DesignLongitudinalLongitudinalCross-sectionalCross-sectionalCross-sectional
Sample sizeBL: 2935BL: 407941931012698
FU: 1816FU: 1817
Response rateBL:76%BL: 49%51%49%66%
1st FU: 73%FU: 45%
2nd FU: 62%
AgeBL: 11.1BL: 118-10 and 14-1611-1711
FU: 15.1FU: 14
Sex distribution (% of girls)51511005049
Description of puberty4 stages4 stages5 stages4 stages4 stages
Data collection for pubertyQuestionnaire PDSTelephone itw PDSPhysical examination Tanner stagesTelephone itw PDSQuestionnaire PDS
Description of back painBP = frequencyBP = frequencyBP = areas (LBP/MBP/NP)BP = duration (>one day or more)BP = duration (>1 month)
Data collection for back painQuestionnaireTelephone itwSemi-structured itwTelephone itwQuestionnaire
Recall period for back3 months3 months1 month3 months12 months
Other extrinsic factors than age and sexPubertal status at BLPubertal status at BLOverweight SmokePrevious pain DepressionNot in the analysis for back pain
BP at BLBP at BL
Dose–response analysis possiblePrevalence estimate AND frequency of symptoms in relation to puberty stagesPrevalence estimate AND frequency of symptoms in relation to puberty stagesPrevalence estimate in relation to puberty stagesPrevalence estimate in relation to puberty stagesPrevalence estimate in relation to puberty stages

BL = baseline
FU = follow up
Itw = interview
PDS = pubertal development scales
BP = back pain.