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Table 3

Summary of results from four articles reporting on five studies on puberty and back pain

Jansens [ 33 ] Jansens [ 33 ] Wedderkopp [ 35 ] LeResche [ 34 ] Hulsegge [ 32 ]
Netherland USA
Prevalence estimates of back pain
(Puberty stage: Number or percentage of children with BP/Number of individuals)Stage 1: 52/179
? : 15%/992 girls? : 30.5%/1069 girlsStage 2: 22/68Puberty stage <2: ?/155? : 3.2%/1313 girls
Stage3: 8/16Puberty stage 2 to 3: ?/?
? : 11.1%/1004 boys? : 22.1%/1018 boysStage 4: 40/76Puberty stage > 3: ?/594? : 2.1%/1325 boys
Stage 5: 38/74
OR obtained by logistic regression
(Dependent variable: back pain/independent variable: puberty stage)
Unadjusted OR = 1.34* (95% CI 1.13-1.57)Unadjusted OR = 1.61* (95% CI 1.30-1.99)Unadjusted values: Not providedBoys: Unadjusted OR = 1.9* (p < 0.0001)Unadjusted values: Not provided
Adjusted OR = 1.24* (95% CI 1.04-1.46)a Adjusted OR = 1.52* (95% CI 1.22-1.89)a Adjusted OR = 1.2* (95% CI 1.2-1.4)b Girls: Unadjusted OR OR = 2.0* (p < 0.0001)Both: Adjusted OR = 1.23 (95% CI 0.77-1.96)c
Adjusted values not provided, however association said to have remained when controlling on age and parental educationBoys: Adjusted OR = 2.86* (95% CI 1.14-7.15)c
Girls: Adjusted OR = 1.09 (95% CI 0.65-1.84)c
Assumption of linearity fulfilled for logistic regression YesYesYesYesNot reported
For both sexes: For both sexes: For girls only: For girls and boys: For boys only:
Unadjusted values:Unadjusted values:Unadjusted values:Unadjusted values:Unadjusted values:
Dose–response (Odds ratios by puberty stage)Puberty stage 1 (Index)Puberty stage 1 (Index)Puberty stage 1 (Index)
Puberty stage 2 OR = 1.34# Puberty stage 2 OR = 1.61# Puberty stage 2 OR = 1.1 (95% CI0.6-2.0)Puberty stageGirlsBoys
Puberty stage 3 OR = 1.79# Puberty stage 3 OR = 2.59# Puberty stage 3 OR = 2.3 (95% CI0.8-6.5)1(Index)(Index)Not provided
Puberty stage 4 OR = 2.4# Puberty stage 4 OR = 4.17# Puberty stage 4 OR = 2.6 (95% CI1.5-4.7)2OR = 2# OR = 1.9#
Adjusted valuesa:Adjusted valuesa:Puberty stage 5 OR = 2.4 (95% CI1.4-4.3)3OR = 4# OR = 3.61#
4OR = 7.99# OR = 6.86#
Puberty stage 1 (Index)Puberty stage 1 (Index)Adjusted valuesb:Adjusted values:Adjusted valuesc
Puberty stage 2 OR = 1.24# Puberty stage 2 OR = 1.52# Puberty stage 1 (Index)Not providedPuberty stage 1 (Index)
Puberty stage 3 OR = 1.54# Puberty stage 3 OR = 2.3# Puberty stage 2 OR = 1.1 (95% CI 0.7-2.0)Puberty Stage 2 OR = 2.86#
Puberty stage 4 OR = 1.9# Puberty stage 4 OR = 3.5# Puberty stage 3 OR = 1.6 (95% CI 0.5-4.6)Puberty stage 3 OR = 8.18#
Puberty stage 4 OR = 2.0 (95% CI 1.3-3.5)*Puberty stage 4 OR = 23.4#
Puberty stage 5 OR = 2.1 (95% CI 1.1-4.1)*
Strength of association based on index versus last stage of puberty Puberty stage 4Puberty stage 4Puberty stage 5Puberty stage 4Puberty stage 4
Unadjusted OR = 2.4# Unadjusted OR = 4.17# Unadjusted OR = 2.4 (95% CI 1.4-4.3)Unadjusted OR = 7.99# for girls
Adjusted OR = 1.9#a Adjusted OR = 3.5# Adjusted OR = 2.1 (95% CI 1.1-4.1)*b Unadjusted OR = 6.86# for boysAdjusted OR = 23.4#c
Temporality tested Positive association noted between puberty stage at baseline and BP at follow-up after adjustment for back pain at baselinePositive association noted between puberty stage at baseline and BP at follow-up after adjustment for back pain at baselineNANANA

OR = Odds ratio.

BP = Back pain.

CI = confidence interval.

*statistically significant.

#estimations of odds ratio (comparison of each stages compared to the index value) calculated from logistic regression provided in article.

& ORs not calculated for girls and both sexes together because not significant.

(a)adjusted for sex and back pain.

(b)adjusted for overweight and smoking/stratified by age.

(c)adjusted for age and sex.

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